Duggal, K. L.; Sharma, R. Semi-symmetric metric connections in a semi-Riemannian manifold. (English) Zbl 0607.53012 Indian J. Pure Appl. Math. 17, 1276-1283 (1986). Reviewer: T.Okubo MSC: 53B30 PDF BibTeX XML Cite \textit{K. L. Duggal} and \textit{R. Sharma}, Indian J. Pure Appl. Math. 17, 1276--1283 (1986; Zbl 0607.53012)
Duggal, K. L. On the geometry of electromagnetic fields of second class. (English) Zbl 0513.53017 Indian J. Pure Appl. Math. 14, 455-461 (1983). MSC: 53B35 53C15 53B50 PDF BibTeX XML Cite \textit{K. L. Duggal}, Indian J. Pure Appl. Math. 14, 455--461 (1983; Zbl 0513.53017)