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@article{MS2_1963__13_165860, author = {E.R. Deal}, title = {Quasi-Spectral {Theory.}}, journal = {Mathematica Scandinavica}, pages = {188--198}, publisher = {mathdoc}, volume = {13}, year = {1963}, zbl = {0146.12605}, url = {http://geodesic.mathdoc.fr/item/MS2_1963__13_165860/} }
E.R. Deal. Quasi-Spectral Theory.. Mathematica Scandinavica, Tome 13 (1963), pp. 188-198. http://geodesic.mathdoc.fr/item/MS2_1963__13_165860/