@article{GDZPPN002480352,
title = {A Comparison Method for Forced Oscillations.},
journal = {Monatshefte f\"ur Mathematik},
volume = {84},
year = {1977},
pages = {37-42},
zbl = {0344.34063},
url = {http://dml.mathdoc.fr/item/GDZPPN002480352}
}
Onose, Hiroshi. A Comparison Method for Forced Oscillations.. Monatshefte für Mathematik, Tome 84 (1977) pp. 37-42. http://gdmltest.u-ga.fr/item/GDZPPN002480352/