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@article{CMH_1981__56_139872, author = {Steven Hurder}, title = {On the secondary classes of foliations with trivial normal bundles.}, journal = {Commentarii mathematici Helvetici}, pages = {307--326}, publisher = {mathdoc}, volume = {56}, year = {1981}, zbl = {0467.57008}, url = {http://geodesic.mathdoc.fr/item/CMH_1981__56_139872/} }
Steven Hurder. On the secondary classes of foliations with trivial normal bundles.. Commentarii mathematici Helvetici, Tome 56 (1981), pp. 307-326. http://geodesic.mathdoc.fr/item/CMH_1981__56_139872/