@article{GDZPPN002311836,
title = {A Two Hilbert Space Scattering Theorem.},
journal = {Mathematische Annalen},
volume = {217},
year = {1975},
pages = {257-262},
zbl = {0323.47006},
url = {http://dml.mathdoc.fr/item/GDZPPN002311836}
}
Lyford, William C. A Two Hilbert Space Scattering Theorem.. Mathematische Annalen, Tome 217 (1975) pp. 257-262. http://gdmltest.u-ga.fr/item/GDZPPN002311836/