Sharma, Ramesh; Duggal, Krishan L. Solutions of Einstein’s equations with conformal symmetries and a contact slice. (English) Zbl 1238.53051 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 71, No. 12, e-Suppl., e701-e705 (2009). MSC: 53C50 83C15 83C20 PDF BibTeX XML Cite \textit{R. Sharma} and \textit{K. L. Duggal}, Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 71, No. 12, e701--e705 (2009; Zbl 1238.53051) Full Text: DOI
Duggal, Krishan L.; Sharma, Ramesh Conformal Killing vector fields on spacetime solutions of Einstein’s equations and initial data. (English) Zbl 1159.53329 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 63, No. 5-7, e447-e454 (2005). MSC: 53C40 53C25 PDF BibTeX XML Cite \textit{K. L. Duggal} and \textit{R. Sharma}, Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 63, No. 5--7, e447--e454 (2005; Zbl 1159.53329) Full Text: DOI
Duggal, Krishan L. Warped product of lightlike manifolds. (English) Zbl 1042.53518 Nonlinear Anal., Theory Methods Appl. 47, No. 5, 3061-3072 (2001). MSC: 53C50 PDF BibTeX XML Cite \textit{K. L. Duggal}, Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 47, No. 5, 3061--3072 (2001; Zbl 1042.53518) Full Text: DOI