Lee, Jung Rye; Park, Choonkil; Cho, Yeol Je; Shin, Dong Yun Orthogonal stability of a cubic-quartic functional equation in non-Archimedean spaces. (English) Zbl 1277.39042 J. Comput. Anal. Appl. 15, No. 3, 572-583 (2013). Reviewer: Jacek Chmieliński (Kraków) MSC: 39B82 39B55 39B52 47S10 PDFBibTeX XMLCite \textit{J. R. Lee} et al., J. Comput. Anal. Appl. 15, No. 3, 572--583 (2013; Zbl 1277.39042)
Lee, Hyunju; Kim, Seon Woo; Son, Bum Joon; Lee, Dong Hwan; Kang, Seung Yeon Additive-quartic functional equation in non-Archimedean orthogonality spaces. (English) Zbl 1524.39051 Korean J. Math. 20, No. 1, 33-46 (2012). MSC: 39B82 39B55 39B52 47S10 PDFBibTeX XMLCite \textit{H. Lee} et al., Korean J. Math. 20, No. 1, 33--46 (2012; Zbl 1524.39051) Full Text: DOI