R. M. Sousa, O. S. Aguiar, A. B. A. Andrade, A. C. Medeiros, and P. B. Maracajá, “Africanized honey bees (Apis mellifera L.) density for pollination in culture of the melon (Cucumis melo L.) in the state of Ceará – Brazil”, Acta Api. Bra., vol. 1, no. 1, pp. 09–12, Jul. 2013.