Sokhats’kyi, F. M. “On the Classification of Functional Equations on Quasigroups”. Ukrains’kyi Matematychnyi Zhurnal 56, no. 9 (September 25, 2004): 1259-1266. Accessed May 7, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3839.