@article{GDZPPN002419351, title = {Unitary Equivalence of Stark Hamiltonians.}, journal = {Mathematische Zeitschrift}, volume = {154}, year = {1977}, pages = {55-70}, zbl = {0338.47009}, url = {http://dml.mathdoc.fr/item/GDZPPN002419351} }
Herbst, Ira W. Unitary Equivalence of Stark Hamiltonians.. Mathematische Zeitschrift, Tome 154 (1977) pp. 55-70. http://gdmltest.u-ga.fr/item/GDZPPN002419351/