@article{AUPCM_2016_15_a6,
     author = {Lehlou, Fouad and Moussa, Mohammed and Roukbi, Ahmed and Kabbaj, Samir},
     title = {On the superstability of the cosine and sine type functional equations},
     journal = {Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica},
     publisher = {mathdoc},
     number = {15},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPCM_2016_15_a6/}
}