@article{MZM_1991_50_4_a3,
     author = {N. A. Bobylev},
     title = {The~Helly intersection theorem},
     journal = {Matemati\v{c}eskie zametki},
     pages = {28--32},
     year = {1991},
     volume = {50},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1991_50_4_a3/}
}