@article{ZVMMF_2009_49_3_a3,
     author = {P. D. Lebedev and A. A. Uspenskii},
     title = {Procedures for calculating the nonconvexity measures of a~plane set},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {431--440},
     publisher = {mathdoc},
     volume = {49},
     number = {3},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2009_49_3_a3/}
}