Coman, S., I. Petroman, C. Petroman, F. Dumescu, D. Paicu, D. Avrmescu, C. Bleja, and A. Bela. “Animal Vulnerability and the Necessity of Protecting Them”. Review on Agriculture and Rural Development, vol. 1, no. 1. suppl., Jan. 2012, pp. 133-7, https://iskolakultura.hu/index.php/rard/article/view/13193.