TY  - JOUR
AU  - K. Pohlmeyer
TI  - Higher order perturbation theory of exponential Lagrangians: fourth order
JO  - Informatics and Automation
PY  - 1975
SP  - 201
EP  - 205
VL  - 135
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1975_135_a22/
LA  - en
ID  - TRSPY_1975_135_a22
ER  -