Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1989_11_a6, author = {E. A. Kalita}, title = {Regularity of solutions of second-order elliptic systems}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {37--46}, publisher = {mathdoc}, number = {11}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1989_11_a6/} }
E. A. Kalita. Regularity of solutions of second-order elliptic systems. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 11 (1989), pp. 37-46. http://geodesic.mathdoc.fr/item/IVM_1989_11_a6/