Eshra, Eman, and Reda I. El-kammar. “Peculiar Labial Duct in the Camel Philtrum: Structure and Feasible Functions”. Journal of Advanced Veterinary Research 10, no. 3 (July 3, 2020): 159-164. Accessed December 3, 2020. https://advetresearch.com/index.php/AVR/article/view/487.