Ferrando, Joan Josep; Sáez, Juan Antonio On the space-times admitting two shear-free geodesic null congruences. (English) Zbl 1137.83368 Gen. Relativ. Gravitation 39, No. 3, 343-359 (2007). MSC: 83E05 83C10 53Z05 PDFBibTeX XMLCite \textit{J. J. Ferrando} and \textit{J. A. Sáez}, Gen. Relativ. Gravitation 39, No. 3, 343--359 (2007; Zbl 1137.83368) Full Text: DOI arXiv
Catenacci, Roberto; Salmistraro, Franco On Kähler metrics in Lorentzian manifolds. (English) Zbl 0438.53022 Ann. Inst. Henri Poincaré, Nouv. Sér., Sect. A 31, 355-362 (1979). MSC: 53B30 53B35 PDFBibTeX XMLCite \textit{R. Catenacci} and \textit{F. Salmistraro}, Ann. Inst. Henri Poincaré, Nouv. Sér., Sect. A 31, 355--362 (1979; Zbl 0438.53022) Full Text: Numdam EuDML
Campbell, S. J.; Wainwright, J. Algebraic computing and the Newman-Penrose formalism in general relativity. (English) Zbl 0417.53012 Gen. Relativ. Gravitation 8, 987-1001 (1977). MSC: 53B30 53C05 53A45 53C27 90C90 PDFBibTeX XMLCite \textit{S. J. Campbell} and \textit{J. Wainwright}, Gen. Relativ. Gravitation 8, 987--1001 (1977; Zbl 0417.53012) Full Text: DOI