@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/}
}