Amro, A., M. Younis, and A. Ghania. “Physiological Effects of Some Pollen Substitutes Diets on Caged Honey Bee Workers (Apis Mellifera L.)”. International Journal of Environment, vol. 9, no. 1, Feb. 2020, pp. 87-99, doi:10.3126/ije.v9i1.27589.