Morita Equivalence of Monoids.
Normal congruence relations on division groupoids
Normal functors and strong protomodularity.
Normalisation for the fundamental crossed complex of a simplicial set.
Notes on associative triples of elements in commutative groupoids
Notes on distributive groupoids
O zovšeobecněních pojmu grupy
On (2,2) modular law for ternary GD-groupoids
On a class of groupoids
On a class of subdirectly irreducible groupoids
On a fixobject property for -semigroupoids
On a General Associativity Law in Groupoids.
On a representation of groupoids as sums of directed systems
On a sequence of K. A. Hardie
On a simple one-element extension of left zero semigroups
On Algebras all of Whose Subalgebras are Simple; Some Solutions of Plonka's Problem
On binary polynomials in idempotent commutative groupoids
On categorical crossed modules.
On convergence groupoids
On GD-groupoids with application to n-ary quasigroups.