Xu, Hong-Yan, Cai-Feng Yi, and Ting-Bin Cao. “The Uniqueness Problem for Meromorphic Functions in the Unit Disc Sharing Values and a Set in an Angular Domain”. MATHEMATICA SCANDINAVICA 109, no. 2 (December 1, 2011): 240–252. Accessed November 21, 2024. https://www.mscand.dk/article/view/15187.