@article{10_4153_CJM_1999_004_3,
     author = {Ndombol, Bitjong and haouari, M. El},
     title = {Alg\`ebres quasi-commutatives et carr\'es de {Steenrod}},
     journal = {Canadian journal of mathematics},
     pages = {49--68},
     year = {1999},
     volume = {51},
     number = {1},
     doi = {10.4153/CJM-1999-004-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1999-004-3/}
}