@article{IVM_1989_11_a11,
     author = {S. I. Chelkak},
     title = {Weak regularity of solutions of second-order elliptic quasilinear systems},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {74--84},
     year = {1989},
     number = {11},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1989_11_a11/}
}