1.
Heraiz T, Ammar A, Jeribi A. Essential approximate point and essential defect spectrum of a sequence of linear operators in Banach spaces. MFAT [Internet]. 2019 Dec. 25 [cited 2025 Dec. 15];25(4):373-80. Available from: https://zen.imath.kiev.ua/index.php/mfat/article/view/739