Chern, T. Y. Peter, and Hasi Wulan. “On Coefficients of $ \alpha$-Shapiro Shields Functions”. Tamkang Journal of Mathematics 33, no. 1 (March 31, 2002): 13–20. Accessed December 4, 2024. https://journals.math.tku.edu.tw/index.php/TKJM/article/view/300.