References
- Assmus , E. F. and Key , J. D. 1992 . Designs and Their Codes , Cambridge University Press .
- Berardi , L. 1997 . On blocking sets in a design . Discrete Math. , 177 : 249 – 257 .
- Berardi , L. 1997 . A note on 3-blocked Designs . J. Combin. Designs , 5 : 61 – 69 .
- Berardi , L. 1987 . Irreducible blocking sets in a symmetric design . Boll. Un. Mat. Ital. , 1-A : 39 – 47 .
- Berardi , L. , Buratti , M. and Innamorati , S. 1997 . 4-blocked Hadamard 3-designs . Discrete Math. , 174 : 35 – 46 .
- Berardi , L. and Zuanni , F. 1999 . On the existence of blocking 3-sets in designs . Discrete Math. , 208/209 : 61 – 70 .
- Beth , Th. , Jungnickel , D. and Lenz , H. 1985 . Design Theory , Mannheim, Wien, Zurich : B.I. Wissenschaftsverlag .
- Bose , R. C. and Shrikhande , S. S. 1976 . Baer subdesigns of symmetric balanced incomplete block design . Essay in Probability and Statistics , VIII ( 9 ) : 1 – 16 .
- Bruen , A. A. and Thas , J. A. 1977 . Blocking sets . Geometriae Dedicata , 6 : 193 – 203 .
- de Resmini , M. J. 1982 . On blocking sets in symmetric BIBD’s with λ≥2 . J. Geom. , 18 : 194 – 198 .
- Drake , D. A. 1985 . Blocking sets in block designs . J. Combin. Theory Ser. A , 2 : 459 – 462 .
- Pelikan , J. 1970 . “ Properties of balanced incomplete block designs ” . In Combinatorial Theory and its Applications , Colloq. Math. Soc. J. Bolyai Vol. 4 , 869 – 889 . Amsterdam-London : North Holland Publishing Company .
- Tallini , G. 1982 . Blocking sets nei sistemi di Steiner e d-blocking sets in PG(r, q) e in AG(r, q) . Sem. Geom. Comb. Fac. Ing. Univ. L’Aquila , 3
- van Trung , T. 1996 . Symmetric Designs, The CRC Handbook of Combinatorial Designs , Edited by: Colbourn , C. J. and Dinitz , J. H. 75 – 87 . CRC Press .