Caldara, G.F., Vitale, C.M., Calderone, O., Lo Cascio, G., Ferrantelli, V. and Sarà, M. 2014. Changes in eggshell ultrastructure of Falco naumanni and Tyto alba exposed to pesticides and polychlorinated biphenyls (PCBs). Italian Journal of Anatomy and Embryology. 118, 2 (Jan. 2014), 42.