no. 1
On generalizations of Gödel's universe
Annales de l'institut Henri Poincaré. Section A, Physique Théorique, Tome 4 (1966) no. 1, pp. 21-29 
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     author = {Raval, H. M. and Vaidya, P. C.},
     title = {On generalizations of {G\"odel's} universe},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {21--29},
     year = {1966},
     publisher = {Gauthier-Villars},
     volume = {4},
     number = {1},
     language = {en},
     url = {https://www.numdam.org/item/AIHPA_1966__4_1_21_0/}
}
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Raval, H. M.; Vaidya, P. C. On generalizations of Gödel's universe. Annales de l'institut Henri Poincaré. Section A, Physique Théorique, Tome 4 (1966) no. 1, pp. 21-29. https://www.numdam.org/item/AIHPA_1966__4_1_21_0/

[1] K. Gödel, Rev. Mod. Phys., t. 21, 1949, p. 447. | Zbl

[2] E. Schücking and O. Heckmann, Report of Solvay Conference, Bruxelles, 1958.

[3] A. Lichnerowicz, Théories relativistes de la gravitation et l'électromagnétisme, Masson, 1955, p. 14. | Zbl

[4] J.L. Synge, Relativity : The general theory, p. 338. | Zbl

[5] H.M. Raval and P.C. Vaidya, Curr. Sci., t. 34, 1965, p. 175.