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.
On Groupoids Having a Linear Congruence Class Geometry.
On highly non-associative groupoids
On Lie algebroid actions and morphisms
On Modular Law for Ternary -Groupoids
On non-associative groupoids
On order and betweenness compatibility.