Balinsky A. I. “Discrete Models on One-Dimensional Net With the Preset Lie Algebra of Symmetries”. Ukrains’kyi Matematychnyi Zhurnal 44, no. 9 (October 7, 1992): 1170-1174. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/8165.