@article{AIHPA_1974__21_4_319_0,
     author = {York, James W. Jr.},
     title = {Covariant decompositions of symmetric tensors in the theory of gravitation},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {319--332},
     publisher = {Gauthier-Villars},
     volume = {21},
     number = {4},
     year = {1974},
     mrnumber = {373548},
     zbl = {0308.53018},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1974__21_4_319_0/}
}