1. Alber, M., Jordan, R., Ruttner, F., Ruttner, H.: Von der Paarung der Honigbiene Die Versuche von Vulkano. Z. Bienenforsch. 3, 1–28 (1955)
2. Butler, C.G.: A sex attractant acting as an aphrodiac in the honeybee. Proc. R. Soc. London 42, 71–76 (1967)
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4. Butler C.G., Fairey, E.M.: Pheromones of the honeybee: biological studies of the mandibular gland secretion of the queen. J. apic. Res. 3, 65–76 (1964)
5. Butler, C.G., Paton, P.N.: Inhibition of queen rearing by queen honeybees of different ages. Proc. R. Ent. Soc. London (A) 37, 114–116 (1962)