Livins’kyiI. V., and RadchenkoD. V. 2012. “Representations of Algebras Defined by a Multiplicative Relation and Corresponding to the Extended Dynkin Graphs $\tilde{D}_4, \tilde{E}_6, \tilde{E}_7, \tilde{E}_8$”. Ukrains’kyi Matematychnyi Zhurnal 64 (12), 1654-75. https://umj.imath.kiev.ua/index.php/umj/article/view/2689.