%0 Journal Article
%A A. A. Ardentov
%T Extremal paths in the nilpotent sub-Riemannian problem on the Engel group (subcritical case of pendulum oscillations)
%J Contemporary Mathematics. Fundamental Directions
%D 2011
%P 30-35
%V 42
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMFD_2011_42_a3/
%G ru
%F CMFD_2011_42_a3