@article{GDZPPN002206676,
title = {Breathers and forced oscillations of nonlinear wave equations on R3.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {394},
year = {1989},
pages = {25-35},
zbl = {0666.35066},
url = {http://dml.mathdoc.fr/item/GDZPPN002206676}
}
Smiley, Michael W. Breathers and forced oscillations of nonlinear wave equations on R3.. Journal für die reine und angewandte Mathematik, Tome 394 (1989) pp. 25-35. http://gdmltest.u-ga.fr/item/GDZPPN002206676/