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@article{IM_1974__24_142278, author = {Ulrich Koschorke}, title = {Concordance and {Bordism} of {Line} {Fields.}}, journal = {Inventiones mathematicae}, pages = {241--268}, publisher = {mathdoc}, volume = {24}, year = {1974}, zbl = {0285.57013}, url = {http://geodesic.mathdoc.fr/item/IM_1974__24_142278/} }
Ulrich Koschorke. Concordance and Bordism of Line Fields.. Inventiones mathematicae, Tome 24 (1974), pp. 241-268. http://geodesic.mathdoc.fr/item/IM_1974__24_142278/