1.         Panchich J: City flora of the principality Bulgaria. Belgrad: State Printing House; 1883.
2.         Georgiev S: Materials for the flora of south Bulgaria (Trakia). Sborn Nar Umotv Naouka Knizhn 1889, 1:1-112 (in Bulgarian).
3.         Georgiev S: Rhodopi and Rila mountains and their vegetation. Sborn Nar Umotv Naouka Knizhn 1891, 4:557-585 (in Bulgarian).
4.         Urumov I: Materials for the flora of Lovech district. Sborn Nar Umotv Naouka Knizhn 1897, 14:1-85 (in Bulgarian).
5.         Urumov I: Materials for the flora of Turnovo district. Sborn Nar Umotv Naouka Knizhn 1898, 15:3-90 (in Bulgarian).
6.         Urumov I: Second addition to the flora of Lovech district. Sborn Nar Umotv Naouka Knizhn 1898, 15:91-104 (in Bulgarian).
7.         Velenovsky J: Flora Bulgarica, Suplementum I. Pragae, Prostat apud frrivna bibliopalam 1898:676.
8.         Urumoff J: Beitrage zur flora von Bulgarien. II. Osterr Bot Z 1900, 1:1-5.
9.         Urumov I: Contribution to the Bulgarian flora. Sborn Nar Umotv Naouka Knizhn 1901, 18:1-124 (in Bulgarian).
10.         Toshev A: Materials for the flora of Varshec and surroundings. Period Spis Bulg Knizh Druzh 1902, 62:464-499 (in Bulgarian).
11.         Urumov I: Second contribution to the Bulgarian flora. Period Spis Bulg Knizh Druzh 1902, 62:293-409 (in Bulgarian).
12.         Velenovsky J: Neue nachtrage zur flora Bulgarien. Sitzungsber Gesder Wis 1902.
13.         Toshev A: South-west Bulgaria in floristic respect. Period Spis Bulg Knizh Druzh 1903, 63: (in Bulgarian).
14.         Toshev A: About vegetation of Sredna gora. Period Spis Bulg Knizh Druzh 1903, 4:390-434 (in Bulgarian).
15.         Urumov I: Materials for the flora of Lovech and Turnovo distincts. Sborn Nar Umotv Naouka Knizhn 1904, 18:125-165 (in Bulgarian).
16.         Urumov I: Third contribution to the Bulgarian flora. Sborn Nar Umotv Naouka Knizhn 1904, 20:1-103 (in Bulgarian).
17.         Neichev I: About the flora of Sevlievo and Gabrovo. Trav Soc Bulg Sci Nat 1905, 4-8:56-58 (in Bulgarian).
18.         Urumov I: Sixth contribution to the Bulgarian flora. Sborn Nar Umotv Naouka Knizhn 1906, 22:1-126 (in Bulgarian).
19.         Davidov B: Second contribution to the Bulgarian flora. Sborn Nar Umotv Naouka Knizhn 1907, 22:1-123 (in Bulgarian).
20.         Neichev I: Materials for the flora of Gaborvo region and Balkan (from Kademlia to Bedek). Sborn Nar Umotv Naouka Knizhn 1908, 24:1-83 (in Bulgarian).
21.         Urumov I: Seventh contribution to the Bulgarian flora. Sborn Nar Umotv Naouka Knizhn 1908, 14:1-113 (in Bulgarian).
22.         Urumov I: Tenth contribution to the Bulgarian flora. Sborn Nar Umotv Naouka Knizhn 1909, 25:1-159 (in Bulgarian).
23.         Urumov I: Twelveth contribution to the Bulgarian flora. Sborn Bulg Akad Nauk 1913, 2:1-243 (in Bulgarian).
24.         Davidov B: One flowers picking in west Trakia. Trav Soc Bulg Sci Nat 1915, 8:43-127 (in Bulgarian).
25.         Urumov I: Thirteenth contribution to the Bulgarian flora. Sborn Bulg Akad Nauk 1917, 7:1-225 (in Bulgarian).
26.         Stojanov N: Floristic materials from Belasitsa. God Sofiisk Univ "Kliment Ohridski" Fiz Mat Fak 1920, 16:1-133 (in Bulgarian).
27.         Stranski I: Plant relations in Middle Rhodopes. Sborn Bulg Akad Nauk 1921, 16:9-147 (in Bulgarian).
28.         Urumov I: Materials for the flora of Pirin mountain. Spis Bulg Akad Nauk 1923, 28:109-178 (in Bulgarian).
29.         Jordanov D: About phytogeography of West Stara planina mountain. God Sofiisk Univ "Kliment Ohridski" Fiz Mat Fak 1924, 1:71-102 (in Bulgarian).
30.         Stojanov N: Floristic notes from Bulgarian north-east Macedonia. God Sofiisk Univ "Kliment Ohridski" Agronom Fak 1924, 2:133-142 (in Bulgarian).
31.         Urumov I: Fifteenth contribution to the Bulgarian flora. Sborn Bulg Akad Nauk 1926, 22:3-128 (in Bulgarian).
32.         Urumov I: Sixteenth contribution to the Bulgarian flora. Sborn Bulg Akad Nauk 1928, 23:3-127 (in Bulgarian).
33.         Urumov I: Flora of the Lulin mountain. Spis Bulg Akad Nauk 1929, 40:1-117 (in Bulgarian).
34.         Urumov I: List of the plants collected from Karlovo district. Sborn Bulg Akad Nauk 1929, 25:6-135 (in Bulgarian).
35.         Urumov I: The flora of Vitosha mountain. Sborn Bulg Akad Nauk 1930, 26:1-143 (in Bulgarian).
36.         Stefanoff B, D. Jordanoff: Beitrag zur kenntnis der flora des Dospagerbirge (West Bulgarien). Bull Soc Bpt De Bulgarie 1931, 4:31-33.
37.         Rechinger K: Ergebnisse einer botanischen reise nach Bulgarien. Mag Bot Lap Bd 1933, 32.
38.         Drenovski A: The flora of the Macedonian mountain Ali-botush. own issue 1934:1-23 (in Bulgarian).
39.         Ronniger K: Floristische Ergebrnisse einer reise nach Bulgarien. Repert Sp Nov regni veg 1935, 29:142-149.
40.         Urumov I: The flora of Vraca district. Sborn Bulg Akad Nauk 1935, 29:1-205 (in Bulgarian).
41.         Urumov I: The flora of the Kyustendil district. Sborn Bulg Akad Nauk 1935, 30:1-235 (in Bulgarian).
42.         Drenovski A: Beitrag zur Flora Alibotus-Kitkaberg in Bulgarish-Macedonien. 1937:1-16.
43.         Kitanov B: New and rare plants for the flora of mountains in west Bulgaria. Izv Bulg Bot Druzh 1939, 8:102-115 (in Bulgarian).
44.         Baev S: Botanical field trip. Sofia (in Bulgarian): BAN; 1947.
45.         Stojanov N, Stefanov B.: Flora of Bulgaria, 3 edn. Sofia (in Bulgarian): Univ. Press; 1948.
46.         Pawlowski B: Alchemilae carpaticae et balcanicae novae. Bull De l'Academie Polon Des scientes et letters Coase des Sc Nat et Mat Ser B ScNat 1949.
47.         Rothmaler W: Systematische vorarbeiten zu einer monographie der Gattung Alchemilla (L.) Scop. Repert Sp Nov regni veg 1950, 46:122-132.
48.         Kiryakov K, St. Dimitrov, D. Delipavlov: A contribution to investigation of the medicinal vegetation in central part of Stara planina mountain. God Durzh Univ Plovdiv Agronom Fak 1951, 5:295-326 (in Bulgarian).
49.         Pawlowski B: Alchemilla in tribus itinteribus balcanicis lectae. Acta Soc Botanicorum Poloniae 1953.
50.         Pawlowski B: Przywzotniki rebranew czasietzrech podozy balkanskich Alchemilae in tribus itineribus balcanicus lectae. Acta Soc Bot Pol 1953, 22:1-22.
51.         Rothmaler W: Systematic und Geographie der subsektion Calycanthum der Gattung Alchemilla. Repert Sp Nov regni veg 1953, 50:59-93.
52.         Jordanov D, P. Panov: New materials and notes about the flora of Bulgaria. Izv Bot Inst (Sofia) 1965, 15:259-263 (in Bulgarian).
53.         Penev I: Grass community in treeless zone at Vitosha mountain. God Sofiisk Univ "Kliment Ohridski" Biol Fak,2 Bot 1965, 58:59-87 (in Bulgarian).
54.         Dimitrov S, D. Delipavlov, M. Popova, D. Gramatikov, Il. Cheshmedzhiev: Materials and notes about the flora of Bulgaria. God Durzh Univ Plovdiv Agronom Fak 1967, 1:215-220 (in Bulgarian).
55.         Walters SM, B.Pawlowski: Alchemilla L. In: Tutin T.G., Heywood V.H. (eds.) Flora Europaea. Vol. 2, pp. 48-64. Cambridge: Cambridge University Press. 1968.
56.         Assenov I: Alchemilla L. - In: Jordanov, D. (ed.), Fl. Reipubl. Popularis Bulgaricae. Vol. 5, pp 274-329. In Aedibus Acad. Sci. Bulgaricae, Serdicae (in Bulgarian). 1973.
57.         Bondev I, T. Meshinev, N. Andreev: Botanical characterization of "Bistrishko branishte" reserve. - In: Velchev, V. 1081 (ed.), Third Nat. Conf. Bot., Sofia 26-30.10.1981. Pp 935-948. Publishing House Bulg. Acad. Sci., Sofia. 1983.
58.         Dimitrov D: New chorological data for the flora of Bulgaria. God Sofiisk Univ "Kliment Ohridski" Biol Fak,2 Bot 1995, 87:53-57.
59.         Soberon J, J. Llorente, L. Onate: The use of specimen-label databases for conservation purposes: an example using Mexican Papilionid and Pierid butterflies. Biodiversity and Conservation 2000, 9:1441-1466.
60.         Apostolova I, T. Meshinev: Vegetation map of the high mountain treeless zone in Vitosha Natural park - In: Temniskova, D. (ed.), Proc. of Sixth Nat. Conf. of Bot., Sofia, June 18-20, 2001. Pp 241-252. Sofia Univ. "St. Kliment Ohridski" Press. 2001.
61.         Dimitrov M: Syntaxonomic analysis of the herbaceous vegetation in the forest experimental station "Jundola" - In: Temniskova, D. (ed.), Proc. of Sixth Nat. Conf. of Bot., Sofia, June 18-20, 2001. Pp 263-276. Sofia Univ. "St. Kliment Ohridski" Press. 2001.
62.         Vitkova A, D. Gurova: Diversity of protected medicinal plants at Lozen mountain - In: Temniskova, D. (ed.), Proc. of Sixth Nat. Conf. of Bot., Sofia, June 18-20, 2001. Pp 423-430. Sofia Univ. "St. Kliment Ohridski" Press. 2001.
63.         Willis F, J. Moat, A. Paton: Defining a role for herbarium data in Red list assessments: a case study of Plectranthus from eastern and southern Africa. Biodiversity and Conservation 2003, 7:1537-1552.