@article{2654, author = {Smith, John M.}, title = {On the existence of certain matrices}, journal = {Portugaliae mathematica}, volume = {30}, year = {1971}, pages = {93-95}, zbl = {0225.15016}, mrnumber = {0308147}, language = {en}, url = {http://dml.mathdoc.fr/item/2654} }
Smith, John M. On the existence of certain matrices. Portugaliae mathematica, Tome 30 (1971) pp. 93-95. http://gdmltest.u-ga.fr/item/2654/