All {$2$}-{$(21,7,3)$} designs are residual
Spence, Edward
Bull. Belg. Math. Soc. Simon Stevin, Tome 5 (1998) no. 5, p. 441-445 / Harvested from Project Euclid
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Publié le : 1998-05-14
Classification:  {$2$}-designs,  quasi-residual,  classification,  05B05 
@article{1103409023,
     author = {Spence, Edward},
     title = {All {$2$}-{$(21,7,3)$} designs are residual},
     journal = {Bull. Belg. Math. Soc. Simon Stevin},
     volume = {5},
     number = {5},
     year = {1998},
     pages = { 441-445},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1103409023}
}

Spence, Edward. All {$2$}-{$(21,7,3)$} designs are residual. Bull. Belg. Math. Soc. Simon Stevin, Tome 5 (1998) no. 5, pp.  441-445. http://gdmltest.u-ga.fr/item/1103409023/