%0 Journal Article %A Heinrich, Katherine %T Covering Problem for Idempotent Latin Squares %J Canadian mathematical bulletin %D 1983 %P 144-148 %V 26 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1983-023-7/ %R 10.4153/CMB-1983-023-7 %F 10_4153_CMB_1983_023_7