@article{1250525054,
author = {Matsuura, Shigetake},
title = {Partially hypoelliptic and partially elliptic systems of differential operators with constant coefficients},
journal = {J. Math. Kyoto Univ.},
volume = {2},
number = {3},
year = {1962},
pages = { 147-160},
language = {en},
url = {http://dml.mathdoc.fr/item/1250525054}
}
Matsuura, Shigetake. Partially hypoelliptic and partially elliptic systems of differential operators with constant coefficients. J. Math. Kyoto Univ., Tome 2 (1962) no. 3, pp. 147-160. http://gdmltest.u-ga.fr/item/1250525054/