@article{TIMB_2007_15_2_a4,
     author = {V. I. Korzyuk and E. S. Cheb},
     title = {Boundary {Problems} for a {Elliptical} {Second} {Order} {Equations}},
     journal = {Trudy Instituta matematiki},
     pages = {38--47},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMB_2007_15_2_a4/}
}