M. Arunkumar, E. Sathya, & S. Ramamoorthi. (2017). General solution and generalized Ulam - Hyers stability of a additive functional equation originating from N observations of an arithmetic mean in Banach spaces using various substitutions in two different approaches. Malaya Journal of Matematik, 5(01), 4–18. https://doi.org/10.26637/mjm501/002