Guo F, Li Y. A new proof of Bergweiler’s conjecture concerning the first derivative of transcendental meromorphic function with picard exceptional value. Tamkang J. Math. [Internet]. 2015 Mar. 30 [cited 2024 May 3];46(1):91-9. Available from: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/1631