A remark on a Banach-Steinhaus theorem of Narang Antosik, Piotr; Swartz, Charles — 1990 Portugaliae mathematica
Equivanishing sequences of mappings Piotr Antosik — 2000 Banach Center Publications Utilizing elementary properties of convergence of numerical sequences we prove Nikodym, Banach, Orlicz-Pettis type theorems
A theorem on matrices and its applications in functional analysis Piotr Antosik; Charles Swartz — 1984 Studia Mathematica