@article{GDZPPN000462713,
title = {Homological Algebra of Novikov-Shubin Invariants and Morse Inequalities.},
journal = {Geometric and functional analysis},
volume = {6},
year = {1996},
pages = {628-665},
zbl = {0866.57026},
url = {http://dml.mathdoc.fr/item/GDZPPN000462713}
}
Farber, M.S. Homological Algebra of Novikov-Shubin Invariants and Morse Inequalities.. Geometric and functional analysis, Tome 6 (1996) pp. 628-665. http://gdmltest.u-ga.fr/item/GDZPPN000462713/