@inproceedings{inproceedingscc19f85a,
title   = {The levin-nohel equation on the torus},
author = {Oliva, Waldyr Muniz},
year = {1980},
doi = {10.1007/BFb0089321},
publisher = {Springer},
booktitle   = {Conference on Functional Differential Equations and Bifurcation}
}