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♦ 1Assessing the diet of nestling Bearded Vultures: a comparison between direct observation methods, Antoni Margalida, Joan Bertran, and Jennifer Boudet, J. Field Ornithol. 76(1):4045, 2005
♦ 2DIET COMPOSITION OF THE LONG-EARED OWL IN SLOVENIA: SEASONAL VARIATION IN PREY USE, DAVORIN TOME, J Raptor Res. 28(4):253-258
♦ 3Contribution to the study of the diet of four owl species (Aves, Strigiformes) from mainland and island areas of Greece, Haralambos Alivizatos, Vassilis Goutner and Stamatis Zogaris, Belg. J. Zool., 135 (2) : 109-118