Hung, Nguyen Manh, and Hoang Van Hien. “A Preliminary Stury on Ectoparasite Composition of Wild Birds in Ba Be National Park”. Academia Journal of Biology 34, no. 3 (October 2, 2012): 283–287. Accessed January 29, 2022. https://vjs.ac.vn/index.php/vjbio/article/view/2457.