J. Ježek

Directoids: algebraic models of up-directed sets

R. Quackenbush, J. Ježek, 1990 .

The variety generated by equivalence algebras

R. McKenzie, J. Jezek, J. Ježek, 2001 .

Intervals in the lattice of varieties

J. Ježek, 1976 .

Definability in substructure orderings, IV: Finite lattices

J. Ježek, R. McKenzie, 2009 .