1. Abrol, D.P., Bhat, A.A. (1990) Studies on Thai sac brood virus affecting indigenous honey bee Apis cerana indica Fab colonies—prospects and future strategies. J. Anim. Morphol. Physiol. 37, 101–108
2. Abrol, D.P., Putatunda, B.N. (1995) Discovery of an ectoparasitic mite Tropilaelaps koenigerum Delifinado-Baker & Baker on Apis dorsata, A. meliffera L. and Apis cerana F. in Jammu and Kashmir, India. Current Sci 68, 90
3. Ai, H., Yan, X., Han, R. (2012) Occurrence and prevalence of seven bee viruses in Apis mellifera and Apis cerana apiaries in China. J. Invertebr.Pathol 109, 160–164
4. Akratanakul, P. (1975) Biology and systematics of bee mites of the family Varroidae (Acari: Mesostigmata). MS Thesis. Oregon State University. pp 1–64
5. Akratanakul, P. (1990) Beekeeping in Asia. FAO (Food and Agriculture Organisation of the United Nations), Agricultural Services. Bulletin 68/4. Rome, Italy.