@article{MZM_2015_98_5_a0,
     author = {P. A. Borodin and O. N. Kosukhin},
     title = {Quantitative {Expressions} for the {Connectedness} of {Sets} in~${\mathbb R}^n$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {643--650},
     publisher = {mathdoc},
     volume = {98},
     number = {5},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2015_98_5_a0/}
}