@article{10_4064__27_2_323_326,
     author = {H. Maire},
     title = {Hypoelliptic systems of complex vector fields},
     journal = {Banach Center Publications},
     pages = {323--326},
     publisher = {mathdoc},
     volume = {27},
     number = {2},
     year = {1992},
     doi = {10.4064/-27-2-323-326},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/-27-2-323-326/}
}