Saha, A. C., and B. K. Bandyopadhyay. “Energy Distribution Of Pions In Hadron-Nucleus Interactions At 70 Gev”. Indian Science Cruiser, vol. 7, no. 3, Sept. 1993, pp. 28-34, https://informaticsjournals.com/index.php/ISC/article/view/42702.