Dimou, H., Y. Aribou, A. Chahbi, and S. Kabbaj. “Stability of Generalized Jensen Functional Equation on a Set of Measure Zero”. Proyecciones (Antofagasta, On Line), vol. 35, no. 4, Mar. 2017, pp. 457-68, doi:10.4067/S0716-09172016000400007.