1.
BoichukОA, Zhuravlev VF, PokutnyiОО. Normally solvable operator equations in a Banach space. Ukr. Mat. Zhurn. [Internet]. 2013Feb.25 [cited 2023Feb.8];65(2):163-74. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/2411