@article{AIHPA_1979__31_4_339_0,
     author = {Knutsen, H. and Stabell, R.},
     title = {On the possibility of general relativistic oscillations},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {339--353},
     publisher = {Gauthier-Villars},
     volume = {31},
     number = {4},
     year = {1979},
     mrnumber = {574138},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1979__31_4_339_0/}
}