@article{IVM_1989_3_a8,
     author = {K. N. Ospanov and M. Otelbaev},
     title = {A generalized {Cauchy{\textendash}Riemann} system with nonsmooth coefficients},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {48--56},
     year = {1989},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1989_3_a8/}
}