@article{AIHPA_1983__39_2_101_0,
     author = {Knutsen, Henning},
     title = {On the possibility of general relativistic oscillations. {II}},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {101--117},
     publisher = {Gauthier-Villars},
     volume = {39},
     number = {2},
     year = {1983},
     mrnumber = {722681},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1983__39_2_101_0/}
}