"Bosch, J. 1994. The nesting behaviour of the mason bee Osmia cornuta (Latr) with special reference to its pollinating potential (Hymenoptera, Megachilidae). Apidologie, 25 (1): 84-93." . "Bosch (1994)" . "1994"^^ . "1994"^^ . . . . "Bosch (1994)" .