Fahnentransitive Automorphismengruppen von Blockplänen Paul-Hermann Zieschang OriginalPaper Pages: 173 - 180
A covering theorem for Baer subplanes in a cyclic projective plane David A. Drake OriginalPaper Pages: 181 - 190
The ternary rings of Desarguesian and Pappian planes — A simple proof using perspectivities T. V. S. Jagannathan OriginalPaper Pages: 191 - 195
A characterization of Baer cones in finite projective spaces Michael Huber OriginalPaper Pages: 197 - 211
Geodesic completeness of submanifolds in Minkowski space John K. BeemPaul E. Ehrlich OriginalPaper Pages: 213 - 226