1. Über Perspektivitäten in endlichen projektiven Ebenen
2. Partitioning the planes of AG2m(2) into 2-designs
3. Hyperbolic Fibrations and q-Clans
4. R.D. Baker and G.L. Ebert, A nonlinear ‡ock in the Minkowski plane of order 11, Eighteenth Southeastern International Conference on Combinatorics, Graph Theory, and Computing (Boca Raton, Fl. 1989), Congr. Numer. 58 (1987), 75-81.
5. Some new examples of flocks of Q+(3,q)