Hatamleh, R., and V. A. Zolotarev. “On Two-Dimensional Model Representations of One Class of Commuting Operators”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 66, no. 1, Jan. 2014, pp. 108–127, https://umj.imath.kiev.ua/index.php/umj/article/view/2115.