1. Triple Systems;Colbourn,1999
2. On blocking sets in Sλ(t,t+1,v);Gionfriddo;Mitt. Math. Sem. Giessen, H.,1991
3. 2-colouring K4–e designs;Gionfriddo;Austral. J. Combin.,1991
4. Blocking sets in designs with block size four;Hoffman;European J. Combin.,1990
5. Blocking sets preserving embeddings of partial K4–e designs;Lindner;Austral. J. Combin.,1995