@article{DCG_1992__8_1_131208,
     author = {V.G. Boltyanski},
     title = {A {New} {Step} in the {Solution} of the {Sz\"okefalvi-Nagy} {Problem.}},
     journal = {Discrete & computational geometry},
     pages = {27--50},
     publisher = {mathdoc},
     volume = {8},
     number = {1},
     year = {1992},
     zbl = {0756.52009},
     url = {http://geodesic.mathdoc.fr/item/DCG_1992__8_1_131208/}
}