@article{ZNSL_1985_144_a14,
     author = {S. I. Fedorov},
     title = {On the problem of extremal partition of the closed plane},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {149--154},
     publisher = {mathdoc},
     volume = {144},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1985_144_a14/}
}