"Abrol, D.P. 1994. Ecology, behaviour and management of social wasp, Vespa velutina smith (Hymenoptera: Vespidae), attacking honeybee colonies. Korean Journal of Apiculture, 9(1): 5\u201110." . "1994"^^ . . "Abrol (1994)" . . . "Abrol (1994)" . "1994"^^ .