%0 Journal Article %A Nash, John C. M. %T On B 4-Sequences %J Canadian mathematical bulletin %D 1989 %P 446-449 %V 32 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1989-064-2/ %R 10.4153/CMB-1989-064-2 %F 10_4153_CMB_1989_064_2