@article{AIHPA_1966__4_1_21_0,
     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},
     publisher = {Gauthier-Villars},
     volume = {4},
     number = {1},
     year = {1966},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1966__4_1_21_0/}
}