@article{PDM_2009_4_a7,
     author = {V. V. Skobelev},
     title = {``Strings'' theorem and its applications},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {84--89},
     publisher = {mathdoc},
     number = {4},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2009_4_a7/}
}