Kaushik, S. K., Ghanshyam Singh, and . Virender. β€œOn WH Packets in $L^2(\mathbb{R})$”. Communications in Mathematics and Applications 3, no. 3 (December 26, 2012): 333–344. Accessed February 25, 2026. https://rgnpublications.com/journals/index.php/cma/article/view/216.