Two-norm algebras Alexiewicz, A. — 1977 General topology and its relations to modern analysis and algebra IV
Some properties of two-norm spaces and a characterization of reflexivity of Banach spaces A. Alexiewicz; Z. Semadeni — 1960 Studia Mathematica
Remarque sur l'équation fonctionnelle f(x+y)=f(x)+f(y) A. Alexiewicz; W. Orlicz — 1945 Fundamenta Mathematicae