@article{GDZPPN002091186,
title = {Concordance and Bordism of Line Fields.},
journal = {Inventiones mathematicae},
volume = {27},
year = {1974},
pages = {241-268},
zbl = {0285.57013},
url = {http://dml.mathdoc.fr/item/GDZPPN002091186}
}
Koschorke, Ulrich. Concordance and Bordism of Line Fields.. Inventiones mathematicae, Tome 27 (1974) pp. 241-268. http://gdmltest.u-ga.fr/item/GDZPPN002091186/