@article{ZNSL_2013_418_a11,
     author = {P. A. Pugach and V. A. Shlyk},
     title = {Piecewise linear approximation and polyhedral surfaces},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {172--183},
     publisher = {mathdoc},
     volume = {418},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2013_418_a11/}
}