Continuity properties of convex-type set-valued maps.
Characterizations of inner product spaces by strongly convex functions.
On single-valuedness of set-valued maps satisfying linear inclusions.
Multifunctions with selections of convex and concave type.
A sandwich with convexity.
On quadratic stochastic processes.
On convex stochastic processes.
Report of Meeting: The Thiertieth International Symposium on Functional Equations, September 20 - 26, 1992, Oberwolfach, Germany.
On midpoint convex set-valued functions.
On quadratic stochastic processes (Short Communication).
Midpoint convex functions majorized by midpoint concave functions.
Midpoint convex functions majorized by midpoint concave functions. (Short Communication).
On the support of midconvex operators.
On the support of midconvex operators. (Summary).
On convex stochastic processes (Short Communication).
On some class of midconvex functions
A characterization of midconvex set-valued functions
On -invariant measures and a functional equation
Separation by monotonic functions.
A sandwich theorem and Hyers-Ulam stability of affine functions.
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