@article{CRMATH_2014__352_4_351_0,
     author = {Yu, Bin},
     title = {A note on homotopy classes of nonsingular vector fields on $ {S}^{3}$},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {351--355},
     publisher = {Elsevier},
     volume = {352},
     number = {4},
     year = {2014},
     doi = {10.1016/j.crma.2014.01.016},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2014.01.016/}
}