Voir la notice de l'article provenant de la source Math-Net.Ru
@article{TRSPY_1980_147_a3, author = {N. M. Ivochkina}, title = {Second-order differential equations with $d$-elliptic operators}, journal = {Informatics and Automation}, pages = {40--56}, publisher = {mathdoc}, volume = {147}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1980_147_a3/} }
N. M. Ivochkina. Second-order differential equations with $d$-elliptic operators. Informatics and Automation, Boundary value problems of mathematical physics. 10, Tome 147 (1980), pp. 40-56. http://geodesic.mathdoc.fr/item/TRSPY_1980_147_a3/