Ramírez B, W., and J. R. Navarro F. “Infestation Levels of the Mite <i>Varroa jacobsoni</i> in Worker and Drone Honey Bee (<i>Apis mellifera</i≫) Brood in France and Brazil”. Revista De Biología Tropical, vol. 41, no. 3B, Dec. 1993, pp. 883–886, https://revistas.ucr.ac.cr/index.php/rbt/article/view/24436.