Não informado. (2008). Communications of the Department of Chemistry. Bulgarian Academy of Sciences.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Communications of the Department of Chemistry. Sofia: Bulgarian Academy of Sciences, 2008.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Communications of the Department of Chemistry. Bulgarian Academy of Sciences, 2008.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.