@article{2696,
author = {Farlow, S.J.},
title = {Periodic solutions of nonlinear boundary value problems of the second kind},
journal = {Portugaliae mathematica},
volume = {32},
year = {1973},
pages = {25-37},
zbl = {0252.35036},
mrnumber = {0322327},
language = {en},
url = {http://dml.mathdoc.fr/item/2696}
}
Farlow, S.J. Periodic solutions of nonlinear boundary value problems of the second kind. Portugaliae mathematica, Tome 32 (1973) pp. 25-37. http://gdmltest.u-ga.fr/item/2696/