%0 Journal Article %A A. V. Greshnov %T On finding the exact values of the constant in a $(1,q_2)$-generalized triangle inequality for Box-quasimetrics on $2$-step Carnot groups with $1$-dimensional center %J Sibirskie èlektronnye matematičeskie izvestiâ %D 2021 %P 1251-1260 %V 18 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SEMR_2021_18_2_a69/ %G en %F SEMR_2021_18_2_a69