Nerantzi, P.; Tsagas, Gr. A family of metrics with special sectional curvature on a Riemannian manifold. (English) Zbl 1137.53312 Hadronic J. 25, No. 1, 41-52 (2002). MSC: 53B30 PDFBibTeX XMLCite \textit{P. Nerantzi} and \textit{Gr. Tsagas}, Hadronic J. 25, No. 1, 41--52 (2002; Zbl 1137.53312)
Tsagas, Gr.; Christophoridou, Ch.; Synefaki, A. Special bilinear forms on eight dimensional nilpotent Lie algebras. (English) Zbl 1009.17006 Hadronic J. 23, No. 2, 115-129 (2000). MSC: 17B30 PDFBibTeX XMLCite \textit{Gr. Tsagas} et al., Hadronic J. 23, No. 2, 115--129 (2000; Zbl 1009.17006)
Tsagas, Gr.; Christophoridou, Ch.; Synefaki, A. Invariant bilinear forms on nilpotent Lie algebras. (English) Zbl 1012.17006 Hadronic J. 22, No. 3, 273-280 (1999). MSC: 17B30 17B40 PDFBibTeX XMLCite \textit{Gr. Tsagas} et al., Hadronic J. 22, No. 3, 273--280 (1999; Zbl 1012.17006)