Comparative anatomy of male genital organs in the genus Apis.

by Koeniger, G., Koeniger, N., Mardan, Makhdzir, Otis, G., Wongsiri, S.
Published 1991

Numbers of spermatozoa in queens and drones indicate multiple mating of queens in Apis andreniformis and Apis dorsata.

by Koeniger, Gudrun, Koeniger, N., Mardan, Makhdzir, Punchihewa, R. W. K., Otis, G. W.
Published 1990

Evidence of reproductive isolation confirms that Apis andreniformis (Smith, 1858) is a separate species from sympatric Apis florea (Fabricius, 1787).

by Wongsiri, S., Limbipichai, K., Tangkanasing, P., Mardan, Makhdzir, Rinderer, T., Sylvester, H. A., Koeniger, G., Otis, G.
Published 1990