%0 Journal Article
%A K. Pohlmeyer
%T Higher order perturbation theory of exponential Lagrangians: fourth order
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1975
%P 201-205
%V 135
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TM_1975_135_a22/
%G en
%F TM_1975_135_a22