@Article{zbMATH03669204,
Author = {K. I. {Oskolkov}},
Title = {{Polygonal approximation of functions of two variables.}},
FJournal = {{Mathematics of the USSR, Sbornik}},
Journal = {{Math. USSR, Sb.}},
ISSN = {0025-5734},
Volume = {35},
Pages = {851--861},
Year = {1979},
Publisher = {American Mathematical Society (AMS), Providence, RI},
Language = {English},
MSC2010 = {41A30 41A63},
Zbl = {0429.41014}
}