@article{TRSPY_1999_227_a9,
     author = {G. A. Kalyabin},
     title = {Bilateral {Estimates} for the {Least} {Norm} of {Extension} {Operators} from {Plane} {Convex} {Domains} for {Sobolev} {Spaces}},
     journal = {Informatics and Automation},
     pages = {146--151},
     publisher = {mathdoc},
     volume = {227},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1999_227_a9/}
}