Balakrishnan, K. P., and S. Sunil Varma. “Landau’s Theorem for Biharmonic Mappings Constructed from Holomorphic Functions”. Earthline Journal of Mathematical Sciences 16, no. 4 (July 9, 2026): 781-799. Accessed July 9, 2026. https://earthlinepublishers.com/index.php/ejms/article/view/1232.