@article{VYURM_2020_12_1_a4,
     author = {V. G. Sharmin and D. V. Sharmin},
     title = {Studying global properties of a closed non-regular hypersurface with a bijective {Gaussian} mapping using the level function},
     journal = {Vestnik \^U\v{z}no-Uralʹskogo gosudarstvennogo universiteta. Seri\^a, Matematika, mehanika, fizika},
     pages = {37--43},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VYURM_2020_12_1_a4/}
}