1. Commutators in ideals of trace-class operators;Anderson;Indiana Univ. Math. J.,1986
2. M.T. Benameur, T.L. Fack, On von Neumann spectral triples, preprint, Univ. Lyon I, 2001.
3. L.G. Brown, Lidskii's Theorems in the Type II Case, Vol. II, Graduate Texts in Mathematics, Vol. 159, Springer, New York, 1995.
4. The action functional in non-commutative geometry;Connes;Comm. Math. Phys.,1988
5. Functions of One Complex Variable II;Conway,1995