@article{00733294,
title = {Operator equations, separation of variables and relativistic alterations.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {18},
year = {1995},
pages = {59-62},
doi = {10.1155/S0161171295000068},
zbl = {0827.35004},
language = {en},
url = {http://dml.mathdoc.fr/item/00733294}
}
Hermann, Robert A. Operator equations, separation of variables and relativistic alterations.. International Journal of Mathematics and Mathematical Sciences, Tome 18 (1995) pp. 59-62. doi : 10.1155/S0161171295000068. http://gdmltest.u-ga.fr/item/00733294/