@article{VMUMM_2019_2_a10,
     author = {V. I. Kokushkin},
     title = {Existence of a right system whose upper-limit central and general indexes do not coincide with lower-limit ones},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {53--57},
     publisher = {mathdoc},
     number = {2},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2019_2_a10/}
}