@article{3063560, title = "Stability and nonstability of octadecic functional equation in multi-normed spaces", author = "Nazarianpoor, M. and Rassias, J.M. and Sadeghi, G.", journal = "Arabian Journal of Mathematics", year = "2018", volume = "7", number = "3", pages = "219-228", publisher = "Springer-Verlag", issn = "2193-5343", doi = "10.1007/s40065-017-0186-0", abstract = "In this paper, we introduce octadecic functional equation. Moreover, we prove the stability of the octadecic functional equation in multi-normed spaces by using the fixed point method. © 2017, The Author(s)." }