Prem Lata Verma and S. P. Singh, A.S. Ranadive (1999) “Some Approximation Results on A Special Class of Positive Linear Oparators”, Journal of International Academy of Physical Sciences, 3(1-4), pp. 27–40. Available at: https://www.iaps.org.in/journal/index.php/journaliaps/article/view/713 (Accessed: 7 May 2025).