Belintante, F. J. (1940). «On the current and the density of the electric charge, the energy, the linear momentum and the angular momentum of arbitrary fields». Physica7 (5): 449. Bibcode:1940Phy.....7..449B. doi:10.1016/S0031-8914(40)90091-X.
Belintante, F. J. (1940). «On the current and the density of the electric charge, the energy, the linear momentum and the angular momentum of arbitrary fields». Physica7 (5): 449. Bibcode:1940Phy.....7..449B. doi:10.1016/S0031-8914(40)90091-X.