Modular approximation by a filtered family of sublinear operators A. Kasperski — 1987 Commentationes Mathematicae The article contains no abstract
Modular approximation in X ϕ 1 by a filtered family of “linear operators” A. Kasperski — 1991 Commentationes Mathematicae The article contains no abstract
Modular approximation in X ϕ 1 by a filtered family of sublinear operators and convex operators A. Kasperski — 1991 Commentationes Mathematicae The article contains no abstract