TY - JOUR AU - V. G. Sharmin AU - D. V. Sharmin TI - Studying global properties of a closed non-regular hypersurface with a bijective Gaussian mapping using the level function JO - Vestnik Ûžno-Uralʹskogo gosudarstvennogo universiteta. Seriâ, Matematika, mehanika, fizika PY - 2020 SP - 37 EP - 43 VL - 12 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VYURM_2020_12_1_a4/ LA - ru ID - VYURM_2020_12_1_a4 ER -