Não informado. (2008). Communications of the Department of Chemistry. Bulgarian Academy of Sciences.
Chicago-Zitierstil (17. Ausg.)Não informado. Communications of the Department of Chemistry. Sofia: Bulgarian Academy of Sciences, 2008.
MLA-Zitierstil (8. Ausg.)Não informado. Communications of the Department of Chemistry. Bulgarian Academy of Sciences, 2008.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.