@article{AIHPA_1971__15_2_169_0,
     author = {Patel, L. K. and Vaidya, P. C.},
     title = {A generalized plane wave metric},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {169--175},
     publisher = {Gauthier-Villars},
     volume = {15},
     number = {2},
     year = {1971},
     zbl = {0227.53024},
     language = {en},
     url = {http://archive.numdam.org/item/AIHPA_1971__15_2_169_0/}
}