@article{GDZPPN002346540, title = {Hypoelliptic Convolution Equations.}, journal = {Mathematica Scandinavica}, volume = {9}, year = {1961}, pages = {178-184}, zbl = {0102.11003}, url = {http://dml.mathdoc.fr/item/GDZPPN002346540} }
Hörmander, Lars. Hypoelliptic Convolution Equations.. Mathematica Scandinavica, Tome 9 (1961) pp. 178-184. http://gdmltest.u-ga.fr/item/GDZPPN002346540/