@article{1103920594, author = {Dickey, L. A.}, title = {Integrable nonlinear equations and Liouville's theorem. I}, journal = {Comm. Math. Phys.}, volume = {79}, number = {1}, year = {1981}, pages = { 345-360}, language = {en}, url = {http://dml.mathdoc.fr/item/1103920594} }
Dickey, L. A. Integrable nonlinear equations and Liouville's theorem. I. Comm. Math. Phys., Tome 79 (1981) no. 1, pp. 345-360. http://gdmltest.u-ga.fr/item/1103920594/