On common transversals of seperating families.
Some remarques on hypergroups.
Choice Topology
On an enlargement of topologies.
A Structure On A Set Of Subsets
Fixed Points Of Monotone Multifunctions In Partially Ordered Sets
Fixed Points In Antimorphisms
On the completion of incomplete latin squares.
Fixed points of antitone mappings in conditionally complete partially ordered sets.
Common transversals of finite families.
Conjugately factorable isotone self-mappings of complete lattices.
Conjugately Factorable Isotone Self-Mappings Of Complete Lattices
Common Transversals Of Finite Families
On multihomomorphisms.
Group and hypergroup operations induced by multivalued functions
A counterexample to a Kurepa's conjecture
The cosine functional equation for groups
The sine functional equation for groups
Solution of a G. Kurepa's problem
On Multihomomorphisms
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