@article{AIF_1998__48_4_1045_0,
     author = {Sanz, Fernando},
     title = {Non oscillating solutions of analytic gradient vector fields},
     journal = {Annales de l'Institut Fourier},
     pages = {1045--1067},
     publisher = {Association des Annales de l{\textquoteright}institut Fourier},
     volume = {48},
     number = {4},
     year = {1998},
     doi = {10.5802/aif.1648},
     mrnumber = {99k:32071},
     zbl = {0909.34027},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/aif.1648/}
}