Ikemakhen, A. On the holonomy of pseudo-Riemannian manifolds of signature \((2,2+n)\). (Sur l’holonomie des variétés pseudo-riemanniennes de signature \((2,2+n)\).) (French) Zbl 0942.53032 Publ. Mat., Barc. 43, No. 1, 55-84 (1999). Reviewer: D.V.Alekseevsky (Moskva) MSC: 53C29 53C50 PDF BibTeX XML Cite \textit{A. Ikemakhen}, Publ. Mat., Barc. 43, No. 1, 55--84 (1999; Zbl 0942.53032) Full Text: DOI EuDML
Ikemakhen, A. Examples of indecomposable non-irreducible Lorentzian manifolds. (English. Extended French summary) Zbl 0873.53009 Ann. Sci. Math. Qué. 20, No. 1, 53-66 (1996). Reviewer: M.Hotloś (Wrocław) MSC: 53B30 PDF BibTeX XML Cite \textit{A. Ikemakhen}, Ann. Sci. Math. Qué. 20, No. 1, 53--66 (1996; Zbl 0873.53009) Full Text: Link
Kalliongis, John Homotopy equivalences on non-irreducible 3-manifolds. (English) Zbl 0506.57007 Indiana Univ. Math. J. 32, 903-915 (1983). MSC: 57N10 55P10 PDF BibTeX XML Cite \textit{J. Kalliongis}, Indiana Univ. Math. J. 32, 903--915 (1983; Zbl 0506.57007) Full Text: DOI