@article{SM_1985_50_2_a6,
     author = {A. V. Abrosimov},
     title = {Complex differential systems and tangential {Cauchy{\textendash}Riemann} equations},
     journal = {Sbornik. Mathematics},
     pages = {399--414},
     year = {1985},
     volume = {50},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1985_50_2_a6/}
}