@article{AIHPA_1975__22_4_277_0,
     author = {Petry, Walter},
     title = {\"Uber eine {Lorentzinvariante} {Gravitationstheorie}},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {277--290},
     publisher = {Gauthier-Villars},
     volume = {22},
     number = {4},
     year = {1975},
     mrnumber = {413970},
     language = {de},
     url = {http://www.numdam.org/item/AIHPA_1975__22_4_277_0/}
}