@article{MZM_2011_90_4_a12,
     author = {I. N. Shnurnikov},
     title = {On the {Number} of {Regions} {Formed} by {Arrangements} of {Closed} {Geodesics} on {Flat} {Surfaces}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {637--640},
     publisher = {mathdoc},
     volume = {90},
     number = {4},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2011_90_4_a12/}
}