DOBREV, P., PETKOV, P., SVETLEVA, D., IVANOVA, A., DJILIANOV, D., PETKOVA, S., ATANASSOV, A. Analysis of some endogenous plant hormones during induction of somatic embryogenesis in common bean (Phaseolus vulgaris L.). Biotechnology and Biotechnological Equipment. 2001, 15(2), 17-22. ISSN 0205-2067.