Parihar, A. S., S. K. Singh, N. Singh, R. Parasar, and M. Gupta. “Clinical Safety of Fentanyl-Propofol Anesthesia on Haemato-Biochemical Parameters in Dogs”. Toxicology International, vol. 24, no. 3, Dec. 2017, pp. 254-60, https://informaticsjournals.com/index.php/toxi/article/view/21100.