@article{AIF_2007__57_5_1611_0,
     author = {Coutinho, S. C.},
     title = {A constructive proof of the {Density} {of~Algebraic} {Pfaff} {Equations} without {Algebraic} {Solutions}},
     journal = {Annales de l'Institut Fourier},
     pages = {1611--1621},
     publisher = {Association des Annales de l{\textquoteright}institut Fourier},
     volume = {57},
     number = {5},
     year = {2007},
     doi = {10.5802/aif.2308},
     zbl = {1130.34065},
     mrnumber = {2364144},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/aif.2308/}
}