@article{TM_1975_127_a9,
     author = {A. L. Treskunov},
     title = {The generalized {Neumann} problem for second order elliptic equations on the plane},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {146--153},
     year = {1975},
     volume = {127},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1975_127_a9/}
}