1. Avni D., Hendriksma H.P., Dag A., Uni Z., Shafir S. (2014) Nutritional aspects of honey bee-collected pollen and constraints on colony development in the eastern Mediterranean, J. Insect Physiol. 69, 65–73.
2. Avni D., Kielmanowicz M., Inberg A., Golani Y., Lerner I.M, Gafni G., Mahler T. (2015) Quantitative analytical tools for bee health (Apis mellifera) assessment, Julius-Kühn-Archiv 450, 103–110.
3. Bargen H., Fauser A., Gaetschenberger H., Gonsior G., Knaebe S. (2019) Bee colony assessments with the Liebefeld method: How do individual beekeepers influence results and are photo assessments a possibility to reduce variability? SETAC Europe 29th Annual Meeting, Society of Environmental Toxicology and Chemistry Europe (SETAC Europe), Helsinki.
4. Berlepsch A. (1873) Die Biene und ihre Zucht mit beweglichen Waben in Gegenden ohne Spätsommertracht. J. Schneider, Mannheim.
5. Büchler R. (1992) Population dynamics of honeybee colonies with regard to infestation level. Apidologie 23(4): 377–379.