by Merakchiiska, M, Kavalova, H, Iordanov, I
Published in C R Acad Bulg Sci (1976)

by Stoinova, J, Sabeva, Z, Phileva, S. ( Acad. D. Kostoff Institute of Genetics, Bulgarian Academy of Sciences, 1113 Sofia (Bulgaria)), Merakchiiska, M, Paunova, S
Published in Cenetics and Breeding (Bulgaria) (1998)