D. Y. Yakymenko, “Unitarization of Schur representations of a partially ordered set associated with $\widetilde{E}_7$”, Ukr. Mat. Zhurn., vol. 62, no. 6, pp. 847–853, Jun. 2010, Accessed: Feb. 16, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2915