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.