Chajda, Ivan; Halaš, Radomír:
Genomorphisms of lattices and semilattices.
(English).Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica,
vol. 33
(1994),
issue 1,
pp. 23-27
Halaš, Radomír:
A note on homotopy in universal algebra.
(English).Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica,
vol. 33
(1994),
issue 1,
pp. 39-42