@article{1090348355, author = {Drumm, Todd A. and Goldman, William M.}, title = {Isospectrality of Flat Lorentz 3-Manifolds}, journal = {J. Differential Geom.}, volume = {57}, number = {2}, year = {2001}, pages = { 457-465}, language = {en}, url = {http://dml.mathdoc.fr/item/1090348355} }
Drumm, Todd A.; Goldman, William M. Isospectrality of Flat Lorentz 3-Manifolds. J. Differential Geom., Tome 57 (2001) no. 2, pp. 457-465. http://gdmltest.u-ga.fr/item/1090348355/