1. B. Baumeister, Fahnentransitive rank 3 geometrien, die lokal vollstandige graphen sind, Diplomarbeit, FU Berlin, 1992.
2. B. Baumeister, Two new sporadic semibiplanes related toM
22, Europ. J. Combin.15 (1994) 325–335.
3. B. Baumeister, On flag-transitivec.c*-geometries, In: Groups, Difference Sets and the Monster, K. T. Arasu et al. Eds., de Gruyter, Berlin, 1996, pp. 3–21.
4. B. Baumeister, A computer free construction of the third group of Janko, to appear.
5. B. Baumeister and D. Pasechnik, The universal cover of certain semibiplanes, Europ. J. Combin.18 (1997) 491–496.