In the text, references should be cited as follows: single author (Morris, 1991); two authors (Barton & Moore, 1994); more than two authors (Levi et al., 1994). When several references are cited simultaneously, they should be ranked by chronological order e.g.: (Petrovic et al., 2011; 2015) and when their publications are in the same year – alphabetically. All published works referred to in the text must be listed in the reference list and vice versa.
A reference list is arranged alphabetically (by the surname of the first author) and chronologically. When citing several publications by the same author, his individual publications are given first, followed by publications in co-authorship (with one co-author, two co-authors, etc.). It is desirable to list the names of all authors.
Names of authors and journal titles in Cyrillic or alphabet different from Latin should be transliterated into Latin and article titles should be translated into English. The original language of articles and books translated into English is indicated in brackets after the bibliographic reference (in Bulgarian = Bg, in Russian = Ru, in Serbian = Sr, in Chinese – Ch, etc.).
Example: Stoyanova, N., Antonova, V. & Serbezova, D. (2015). A study of introduced black currant varieties. Rastenievadni auki, 52(2), 25-28 (Bg).
In transliteration, letters are replaced as follow: А=A, Б=В, В=V, Г=G, Д=D, Е=Е, Ж=Zh, 3=Z, И=I, Й=Y, K=К, Л=L, М=М, Н=N, О=О, П=Р, Р=R, С=S, Т=Т, У=U, Ф=F, X=H, Ц=Тs, Ч=Сh, Ш=Sh, Щ=Sht, Ъ=А, Ь=Y, Ю=Yu, Я=Ya.
The journal follows the APA citation style. Data in the reference list should be cited as follows:
Journal articles
Author(s) surname and initials, given bold, year, title, journal title (in italic), volume (in italic), number, pages. Examples: Popova, V., Drachev, D. & Nikolova, V. (2006). Investigation on the burning properties of Burley tobacco grown in different regions of Bulgaria. Tobacco, 56(7-8), 159-164.
Solomon, P. S. & Oliver, R. P. (2001). The nitrogen content of the tomato leaf apoplast increases during infection by Cladosporium. Planta, 213(2), 241-249.
Books
Author(s) surname and initials are given bold, year, title, edition, name of the publisher, place of publishing. Example:
Lidanski, T. (1998). Statistical methods in biology and agriculture. Samizdat, Sofia (Bg)
Book chapters or conference proceedings
Author(s) surname and initials, given bold, year, title. In: Title of the book or of the proceedings followed by the editor(s), name of the publisher, place of publishing, volume, pages. Examples:
McGrath, S. P. (1998). Phytoextraction for soil remediation. In: Plants that hyper accumulate heavy metals. CAB Int., Wallingford, UK, 261-287.
Georgiev, D., Dinkova, H. & Georgieva, M. (2008). Study of newly introduced cultivars of black and red currant. In: Sustainable Fruit Growing: From Plant to Product, Proceedings of International Scientific Conference, Latvia, 46-53.
Abstracts of reports on scientific forums
Paychex, V. (1994). Hybrids between (Triticum aestivum L. x Secale cereale L.) and Triticale (2n=6х=42). In: 3rd International Triticale Symposium, 13-17 June 1994, Lisbon, Portugal (Abstracts), B-12.
Dissertations and Philosophy Doctor Theses
Petrova, V. (2015). Economically important pests of apple and fight with them at various technologies of cultivation. Dissertation, Kyustendil, Bulgaria.
Kenyon, L. (1990). Pathogenicity mutants of Fulvia vulva (Cooke). Ph.D. thesis, University of East Anglia, UK
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