Ahmad, Tasawer Shahzad, Talab Hussain, and M. Atif Sultan. “Mass Spectrum and Decay Constants of Heavy Quarkonia: Mass Spectrum and Decay Constants of Heavy Quarkonia”. Proceedings of the Pakistan Academy of Sciences: A. Physical and Computational Sciences 58, no. 2 (December 27, 2021): 73–83. Accessed December 23, 2024. https://ppaspk.org/index.php/PPAS-A/article/view/593.