%0 Journal Article
%A A. O. Ivanov
%A A. A. Tuzhilin
%A Lê Hông Vân
%T Nontrivial Critical Networks. Singularities of Lagrangians and a Criterion for Criticality
%J Matematičeskie zametki
%D 2001
%P 566-580
%V 69
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_2001_69_4_a4/
%G ru
%F MZM_2001_69_4_a4