ARUNKUMAR, M.; KARTHIKEYAN, S. Solution and intuitionistic fuzzy stability of n- dimensional quadratic functional equation: direct and fixed point methods. International Journal of Advanced Mathematical Sciences, [S. l.], v. 2, n. 1, p. 21–33, 2014. DOI: 10.14419/ijams.v2i1.1498. Disponível em: https://www.sciencepubco.com/index.php/IJAMS/article/view/1498.. Acesso em: 3 may. 2024.