Drones of Apis dorsata (Fabricius 1793) congregate under the canopy of tall emergent trees in Borneo.

by Koeniger, N., Koeniger, G., Tingek, S., Kalitu, A., Mardan, Makhdzir
Published 1994

Comparative anatomy of male genital organs in the genus Apis.

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

Reproductive isolation by different time of drone flight between Apis cerana (Fabricius, 1793) and Apis vechti (Maa, 1953)

by Koeniger, N., Koeniger, G., Tingek, S., Mardan, M., Rinderer, T. E.
Published 1988

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