M. Arunkumar, E. Sathya and 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 (Jan. 2017), 4–18. DOI:https://doi.org/10.26637/mjm501/002.