PADMANABHAN, K. S.; RAJAGOPAL, R.; SELVARAJ, C. Sufficient conditions for close-to-convexity of an analytic function in the unit disc. Tamkang Journal of Mathematics, [S. l.], v. 34, n. 1, p. 17–20, 2003. DOI: 10.5556/j.tkjm.34.2003.268. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/268. Acesso em: 19 apr. 2024.