%0 Journal Article %A V. N. Novikov %T On inequalities in a tetrahedron, finished %J Matematičeskoe obrazovanie %D 2021 %P 58-69 %V 99 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MO_2021_99_3_a6/ %G ru %F MO_2021_99_3_a6