@article{1183527796, author = {Yang, C. H.}, title = {A construction for maximal $\left( { + 1, - 1} \right)$-matrix of order $54$}, journal = {Bull. Amer. Math. Soc.}, volume = {72}, number = {4}, year = {1966}, language = {en}, url = {http://dml.mathdoc.fr/item/1183527796} }
Yang, C. H. A construction for maximal $\left( { + 1, - 1} \right)$-matrix of order $54$. Bull. Amer. Math. Soc., Tome 72 (1966) no. 4, . http://gdmltest.u-ga.fr/item/1183527796/