On a Schröder equation arising in branching processes.
On a signed cosine equation of N summands.
On a sum form functional equation.
On a system of functional equations.
On a System of Functional Equations
On a system of functional equations in a multi-dimensional domain.
On a System of Functional Equations in Information Theory.
On a system of functional equations occurring in the theory of geometric objects
On a system of functional equations on quasigroups.
On a Triangular Functional Equation and Some Applications, in Particular to the Generalized Theory of Information.
On a way of division of segments.
On additive and non-additive measures of directed divergence
On additive number-theoretical functions with values in a compact Abelian group.
On algebraic functions satisfying a class of functional equations.
On algebraic functions satisfying a class of functional equations. (Short Communication).
On almost polynomial functions
On alternative functional equations.
On alternative functional equations. (Short Communication).
On alternatives equivalent to the Cauchy functional equation and a related equation.
On alternatives equivalent to the Cauchy functional equation and a related equation. (Short Communication).