1.
Hatamleh R, Zolotarev VA. Triangular models of commutative systems of linear operators close to unitary operators. Ukr. Mat. Zhurn. [Internet]. 2016May25 [cited 2024Dec.4];68(5):694-11. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/1872