Rooin, J.; Rajabi, S.; Moslehian, M. S. Extension of Dunkl-Williams inequality and characterizations of inner product spaces. (English) Zbl 1443.46014 Rocky Mt. J. Math. 49, No. 8, 2755-2777 (2019). MSC: 46C15 47A30 26D15 PDFBibTeX XMLCite \textit{J. Rooin} et al., Rocky Mt. J. Math. 49, No. 8, 2755--2777 (2019; Zbl 1443.46014) Full Text: DOI Euclid
Alonso, Javier; Soriano, María L. On height orthogonality in normed linear spaces. (English) Zbl 0959.46004 Rocky Mt. J. Math. 29, No. 4, 1167-1183 (1999). Reviewer: J.Górnicki (Rzeszów) MSC: 46B20 PDFBibTeX XMLCite \textit{J. Alonso} and \textit{M. L. Soriano}, Rocky Mt. J. Math. 29, No. 4, 1167--1183 (1999; Zbl 0959.46004) Full Text: DOI Link