%0 Journal Article
%A G.J. Fix
%A M.E. Gurtin
%T On Patched Variational Principles with Application to Elliptic and Mixed Elliptic-Hyperbolic Problems.
%J Numerische Mathematik
%D 1977
%P 259-272
%V 28
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NUMA_1977__28_132486/
%F NUMA_1977__28_132486