1. Design Theory;Beth,1985
2. Some unitals on 28 points and their embeddings in projective planes of order 9;Brouwer,1981
3. Subspaces of linear spaces of line size 4;Brouwer;Europ. J. Combin.,1981
4. On cyclic Steiner 2-designs;Colbourn;Ann. Discr. Math.,1980
5. Steiner triple systems with small maximal independent sets;de Brandes;Ars Combin.,1984