%0 Journal Article %A Losey, Gerald %T N-Series and Filtrations of the Augmentation Ideal %J Canadian journal of mathematics %D 1974 %P 962-977 %V 26 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1974-090-9/ %R 10.4153/CJM-1974-090-9 %F 10_4153_CJM_1974_090_9