Arshad, R. M. I. . (2021) “Stringency Criterion for Modality Tests: Stringency Criterion for Modality Tests”, Proceedings of the Pakistan Academy of Sciences: A. Physical and Computational Sciences, 55(3), pp. 77–83. Available at: http://ppaspk.org/index.php/PPAS-A/article/view/141 (Accessed: 4 December 2025).