@article{05243097,
title = {Two classical periodic problems on time scales.},
journal = {Electronic Journal of Differential Equations (EJDE) [electronic only]},
volume = {2007},
year = {2007},
zbl = {1137.39010},
language = {en},
url = {http://dml.mathdoc.fr/item/05243097}
}
Amster, Pablo; Tisdell, Christopher C. Two classical periodic problems on time scales.. Electronic Journal of Differential Equations (EJDE) [electronic only], Tome 2007 (2007) . http://gdmltest.u-ga.fr/item/05243097/