%0 Journal Article %T On the Criterion of Stasheff %J Canadian journal of mathematics %D 1969 %P 250-255 %V 21 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1969-024-6/ %R 10.4153/CJM-1969-024-6 %F 10_4153_CJM_1969_024_6