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@article{GFA_1996__6_1_58230, author = {M.A. Shubin}, title = {Semiclassical {Asymptotics} on {Covering} {Manifolds} and {Morse} {Inequalities.}}, journal = {Geometric and functional analysis}, pages = {370--410}, publisher = {mathdoc}, volume = {6}, number = {1}, year = {1996}, zbl = {0861.58039}, url = {http://geodesic.mathdoc.fr/item/GFA_1996__6_1_58230/} }
M.A. Shubin. Semiclassical Asymptotics on Covering Manifolds and Morse Inequalities.. Geometric and functional analysis, Tome 6 (1996) no. 1, pp. 370-410. http://geodesic.mathdoc.fr/item/GFA_1996__6_1_58230/