@article{05237461,
title = {On the stability of trigonometric functional equations.},
journal = {Advances in Difference Equations [electronic only]},
volume = {2007},
year = {2007},
doi = {10.1155/2007/90405},
zbl = {1148.39024},
language = {en},
url = {http://dml.mathdoc.fr/item/05237461}
}
Kim, Gwang Hui. On the stability of trigonometric functional equations.. Advances in Difference Equations [electronic only], Tome 2007 (2007) . doi : 10.1155/2007/90405. http://gdmltest.u-ga.fr/item/05237461/