@article{AIF_1996__46_4_1159_0,
     author = {Nikolaev, Igor},
     title = {The {Poincar\'e-Bendixson} theorem and arational foliations on the sphere},
     journal = {Annales de l'Institut Fourier},
     pages = {1159--1181},
     publisher = {Association des Annales de l{\textquoteright}institut Fourier},
     volume = {46},
     number = {4},
     year = {1996},
     doi = {10.5802/aif.1544},
     zbl = {0853.57027},
     mrnumber = {1415961},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/aif.1544/}
}