@article{10_4153_CJM_1994_011_4,
     author = {Didierjean, G. and Legrand, A.},
     title = {Equivalences {D'Homotopie} et {Crochet} de {Whitehead}},
     journal = {Canadian journal of mathematics},
     pages = {253--273},
     year = {1994},
     volume = {46},
     number = {2},
     doi = {10.4153/CJM-1994-011-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1994-011-4/}
}