@article{GDZPPN000461407, title = {Von Neumann Spectra Near Zero.}, journal = {Geometric and functional analysis}, volume = {1}, year = {1991}, pages = {375-404}, zbl = {0751.58039}, url = {http://dml.mathdoc.fr/item/GDZPPN000461407} }
Gromov, M.; Shubin, M.A. Von Neumann Spectra Near Zero.. Geometric and functional analysis, Tome 1 (1991) pp. 375-404. http://gdmltest.u-ga.fr/item/GDZPPN000461407/