Lu, Qian, and Qilong Liao. “Normal Criterion and Shared Values by Derivatives of Meromorphic Functions”. Tamkang Journal of Mathematics 45, no. 2 (June 30, 2014): 109–117. Accessed April 29, 2024. https://journals.math.tku.edu.tw/index.php/TKJM/article/view/1014.