@article{AIF_2010__60_3_987_0,
     author = {Altomani, Andrea and Hill, C. Denson and Nacinovich, Mauro and Porten, Egmont},
     title = {Complex vector fields and hypoelliptic partial differential operators},
     journal = {Annales de l'Institut Fourier},
     pages = {987--1034},
     publisher = {Association des Annales de l{\textquoteright}institut Fourier},
     volume = {60},
     number = {3},
     year = {2010},
     doi = {10.5802/aif.2545},
     mrnumber = {2680822},
     zbl = {1197.35083},
     language = {en},
     url = {https://aif.centre-mersenne.org/articles/10.5802/aif.2545/}
}