@article{RMI_2004_2004_1_a9,
     author = {Citti, Giovanna and Tomassini, Giuseppe},
     title = {Ecuaci\'on de {Levi} para estructuras casi complejas.},
     journal = {Revista matem\'atica iberoamericana},
     pages = {151-182},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RMI_2004_2004_1_a9/}
}