Eberhart, George. “Mystery Cats of the World Revisited: Blue Tigers, King Cheetahs, Black Cougars, Spotted Lions, and More by Karl P. N. Shuker”. Journal of Scientific Exploration 35, no. 2 (June 15, 2021): 433-443. Accessed October 8, 2024. https://journalofscientificexploration.org/index.php/jse/article/view/2011.