1. A generalization of the notion of pseudo-complementedness;Varlet;Bull. Soc. Roy. Sci. Liège,1968
2. Notes on lattice congruences;Chajda;Časopis Pěst. Mat.,1978
3. [14] Mitschke Aleit und Wille Rudolf , “Freie modulare Verbände FM(DM3)”,Proceedings of the University of Houston Lattice Theory Conference,Houston, Texas, 1973, 383–396 (Department of Mathematics, University of Houston, Houston, Texas, 1973).
4. A new proof of a theorem of Dilworth;Kurinnoĭ;Vestnik Har'kov. Gos. Univ.,1973
5. S-verklebte Summen von Verb�nden