1. Feeding sugar to bees. 1. Feeders and syrup feeding;Johansson;Bee World,1976
2. Graham, J.M. (1992). The Hive and the Honeybee, Dadant & Sons. [5th ed.].
3. Graham, J.M. (1992). The Hive and the Honeybee, Dadant & Sons. [5th ed.].
4. Acceptance and sustentative values of honey, the sugars of honey and sucrose fed to caged honey bee workers;Barker;Am. Bee J.,1973
5. Considerations in Selecting Sugars for Feeding to Honey Bees;Barker;Am. Bee J.,1977