TY - JOUR AU - V. I. Kokushkin TI - Existence of a right system whose upper-limit central and general indexes do not coincide with lower-limit ones JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 2019 SP - 53 EP - 57 IS - 2 UR - http://geodesic.mathdoc.fr/item/VMUMM_2019_2_a10/ LA - ru ID - VMUMM_2019_2_a10 ER -