Słowik, R. (2018) “The Drazin inverses of infinite triangular matrices and their linear preservers”,
Ukrains’kyi Matematychnyi Zhurnal, 70(4), pp. 534–548. Available at:
https://umj.imath.kiev.ua/index.php/umj/article/view/1574 (Accessed: 14 April 2025).