1. Honey bee nutrition;MH Haydak;Ann Rev Entomology,1970
2. Dietz A (1978) Nutrition of the adult honey bee, in: Graham J.M. (Ed.), The hive and the honey bee, Dadant and Sons, Carthage, Illinois, 125–156.
3. Michener CD (2007) The bees of the world, second edition. The Johns Hopkins University Press, Baltimore.
4. Etude de quelque constituants du pollen;MF Hügel;Ann abeille,1962
5. The nutrient composition of honeybee-collected pollen in Otago, New Zealand;S Day;J Apicult Res,1990