EL-Fassi, Iz-Iddine On approximation of approximately generalized quadratic functional equation via Lipschitz criteria. (English) Zbl 1415.39019 Quaest. Math. 42, No. 5, 651-663 (2019). MSC: 39B52 39B82 PDFBibTeX XMLCite \textit{I.-I. EL-Fassi}, Quaest. Math. 42, No. 5, 651--663 (2019; Zbl 1415.39019) Full Text: DOI
Chahbi, Abdellatif; El-Fassi, Iz-Iddine; Kabbaj, Samir Lipschitz stability of the \(k\)-quadratic functional equation. (English) Zbl 1422.39060 Quaest. Math. 40, No. 8, 991-1001 (2017). MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{A. Chahbi} et al., Quaest. Math. 40, No. 8, 991--1001 (2017; Zbl 1422.39060) Full Text: DOI