Pritula, N. N., Sidorenko, Y. M., & Strampp, W. (1996). Nonlinear integrable systems related to the elliptic lie—baxter algebra. Ukrains’kyi Matematychnyi Zhurnal, 48(2), 220-235. https://umj.imath.kiev.ua/index.php/umj/article/view/5350