Zhuravlev, V.F. (2017) “Weakly perturbed operator equations in Banach spaces”, Ukrains’kyi Matematychnyi Zhurnal, 69(6), pp. 751–764. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/1733 (Accessed: 26 April 2025).