@article{MZM_1991_50_5_a15,
     author = {O. B. Sheremet},
     title = {An~integral estimate of distances between cross sections of two sets by planes},
     journal = {Matemati\v{c}eskie zametki},
     pages = {120--128},
     year = {1991},
     volume = {50},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1991_50_5_a15/}
}