Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1972_204_4_a17, author = {Z. A. Steingrad}, title = {Harmonic frames of reference in {Einstein's} theory of gravity}, journal = {Doklady Akademii Nauk}, pages = {831--833}, publisher = {mathdoc}, volume = {204}, number = {4}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1972_204_4_a17/} }
Z. A. Steingrad. Harmonic frames of reference in Einstein's theory of gravity. Doklady Akademii Nauk, Tome 204 (1972) no. 4, pp. 831-833. http://geodesic.mathdoc.fr/item/DAN_1972_204_4_a17/