%0 Journal Article %A I. A. Bogaevsky %T Front Asymptotics of a Flat Sub-Riemannian Structure on the Engel Distribution %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2023 %P 62-76 %V 321 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_2023_321_a3/ %G ru %F TM_2023_321_a3