@article{05174703,
title = {An addition theorem for the manifolds with the Laplacian having discrete spectrum.},
journal = {Sibirskij Matematicheskij Zhurnal},
volume = {47},
year = {2006},
pages = {557-574},
zbl = {1115.58028},
language = {en},
url = {http://dml.mathdoc.fr/item/05174703}
}
Kuz'minov, V.I.; Shvedov, I.A. An addition theorem for the manifolds with the Laplacian having discrete spectrum.. Sibirskij Matematicheskij Zhurnal, Tome 47 (2006) pp. 557-574. http://gdmltest.u-ga.fr/item/05174703/