@article{CMH_1969__44_139382,
     author = {Jack Alexander Lee},
     title = {Locally {Flat} {Imbeddings} in the {Metastable} {Range.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {70--83},
     publisher = {mathdoc},
     volume = {44},
     year = {1969},
     url = {http://geodesic.mathdoc.fr/item/CMH_1969__44_139382/}
}