Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{PMFA_1980__25_5_a1, author = {Ullmann, Vojt\v{e}ch}, title = {Gravita\v{c}n{\'\i} energie}, journal = {Pokroky matematiky, fyziky a astronomie}, pages = {250--259}, publisher = {mathdoc}, volume = {25}, number = {5}, year = {1980}, language = {cz}, url = {http://geodesic.mathdoc.fr/item/PMFA_1980__25_5_a1/} }
Ullmann, Vojtěch. Gravitační energie. Pokroky matematiky, fyziky a astronomie, Tome 25 (1980) no. 5, pp. 250-259. http://geodesic.mathdoc.fr/item/PMFA_1980__25_5_a1/