Bhandari, Piyush Kumar, and S. K. Bissu. “Turán-Type Inequalities for Bessel, Modified Bessel and Kr ̈tzel Functions”. Journal of Kufa for Mathematics and Computer 5, no. 1 (May 23, 2018): 39–46. Accessed August 12, 2026. https://journal.uokufa.edu.iq/index.php/jkmc/article/view/2093.