Tretynyk, V.V. (1996) “Hidden symmetries of the two-particle dirac equation with linear interaction”, Ukrains’kyi Matematychnyi Zhurnal, 48(9), pp. 1295–1296. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5244 (Accessed: 16 April 2025).