@article{SJIM_2006_9_1_a10,
     author = {S. A. Rybalka},
     title = {Solution of extremal problems in the case of piecewise-smooth approximation of polygons},
     journal = {Sibirskij \v{z}urnal industrialʹnoj matematiki},
     pages = {126--134},
     publisher = {mathdoc},
     volume = {9},
     number = {1},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SJIM_2006_9_1_a10/}
}