Dr. Alok Kumar. “SPECTRAL ASYMPTOTIC BEHAVIOUR OF THE SPECTRUM FOR ZEROS OF EIGEN FUNCTIONS”. Journal of Validation Technology, ISSN: 1079-6630, E-I SSN: 2150-7090 UGC CARE II 29, no. 2 (August 7, 2024): 41–46. Accessed September 13, 2025. https://jvtnetwork.com/index.php/journals/article/view/58.