Singh, Yashwant, and Muhammad Alamgir Khan. “SOME RESULTS INVOLVING GENERALIZED PROLATE SPHEROIDAL WAVE FUNCTION AND I-FUNCTION WITH APPLICATION”. Journal of Research (Science) 18, no. 3 (July 14, 2007): Pages: 177–183. Accessed July 18, 2025. http://jorscience.com/index.php/JRS/article/view/262.