1. Dimension and automorphism groups of lattices;Babai;Alg. Univ.,1981
2. Equivalence systems with finitely many relations;Behrendt;Mh. Math.,1987
3. Maximal antichains in partially ordered sets;Behrendt;Ars Combin.,1988
4. Homogeneity conditions for finite partially ordered sets;Behrendt;Ars Combin.,1990
5. Automorphism groups of posets containing no crowns;Behrendt;Ars Combin.,1990