@article{CMH_1961__36_139228,
     author = {Andr\'e Haefliger},
     title = {Plongements diff\'erentiables de vari\'et\'es dans vari\'et\'es.},
     journal = {Commentarii mathematici Helvetici},
     pages = {47--82},
     year = {1961},
     volume = {36},
     zbl = {0102.38603},
     url = {http://geodesic.mathdoc.fr/item/CMH_1961__36_139228/}
}