URALEGADDI, B. A., and A. R. DESAI. “CONVOLUTIONS OF UNIVALENT FUNCTIONS WITH POSITIVE COEFFICIENTS”. Tamkang Journal of Mathematics 29, no. 4 (December 1, 1998): 279–285. Accessed May 4, 2024. https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4256.