@article{03925648, title = {Finite propagation speed and kernels of strictly elliptic operators.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {8}, year = {1985}, pages = {75-91}, doi = {10.1155/S0161171285000072}, zbl = {0578.47039}, language = {en}, url = {http://dml.mathdoc.fr/item/03925648} }
Gurarie, David. Finite propagation speed and kernels of strictly elliptic operators.. International Journal of Mathematics and Mathematical Sciences, Tome 8 (1985) pp. 75-91. doi : 10.1155/S0161171285000072. http://gdmltest.u-ga.fr/item/03925648/