Dimitrov, Petar, et al. “BONE REGENERATION IN CRITICAL-SIZE CALVARIAL DEFECT IN RATS USING INNOVATIVE NANO COMPOSITE MATERIAL OF CHITOSAN NANO-HYDROXYAPATITE COMPOSITE”. TRADITION AND MODERNITY IN VETERINARY MEDICINE, vol. 2, no. 1, June 2017, pp. 17-20, https://scij-tmvm.com/index.php/pub/article/view/25.