%0 Journal Article
%A Yu. V. Vassilevski
%A K. N. Lipnikov
%T Optimal triangulations: existence, approximations, and double differentiation of $P_1$ finite element functions
%J Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki
%D 2003
%P 866-874
%V 43
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZVMMF_2003_43_6_a8/
%G ru
%F ZVMMF_2003_43_6_a8