Koval, R. F. (2005) “Classification of Quadratic Parastrophically Uncancelable Functional Equations for Five Object Variables on Quasigroups”, Ukrains’kyi Matematychnyi Zhurnal, 57(8), pp. 1058 -. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3664 (Accessed: 2May2024).