1. Beatrous, F.: $$L^p$$-estimates for extensions of holomorphic functions. Michigan Math. J. 32, 361–380 (1985)
2. Connes, A.: The action functional in noncommutative geometry. Commun. Math. Phys. 117, 673–683 (1988)
3. Connes, A.: Noncommutative Geometry. Academic Press, San Diego (1994)
4. Conway, J.: A Course in Functional Analysis, Graduate Texts in Mathematics, vol. 96, 2nd edn. Springer, New York (1990)
5. Dixmier, J.: Existence de traces non normales, C. Roy. Acad. Sci. Paris Sér. A-B 262, A1107–A1108 (1966)