Graph-like combinatorial structures in (r, 1)-designs Original Research Article

This paper is a short report on those (r, 1)-designs which are not discussed explicitly in Gropp (1994). There are altogether 974 (r, 1)-designs with at most 12 points. Most of them are configurations (vr, bk). Moreover, as further examples occur regular graphs and also some previously unknown and more irregular structures which are discussed in this paper.