@article{1103859628,
author = {Pohlmeyer, K.},
title = {Higher order perturbation theory of exponential Lagrangians: fourth order},
journal = {Comm. Math. Phys.},
volume = {35},
number = {1},
year = {1974},
pages = { 321-346},
language = {en},
url = {http://dml.mathdoc.fr/item/1103859628}
}
Pohlmeyer, K. Higher order perturbation theory of exponential Lagrangians: fourth order. Comm. Math. Phys., Tome 35 (1974) no. 1, pp. 321-346. http://gdmltest.u-ga.fr/item/1103859628/