1. D.H. Adams and S. SenPartition Function of a quadratic functional and semiclas-sical approximation for Witten’s 3-manifoldinvariant, Preprint, Trinity College, Dublin, 1996.
2. L. AhlforsComplex AnalysisMcGraw-Hill, New York, 1953.
3. A. Alonso and B. SimonThe Birman-Krein-Vishik theory of self-adjoint exten-sions of semibounded operators J.Operator Theory 4 (1980), 251–270.
4. A. Alonso and B. SimonAddenda to “The Birman-Krein-Vishik theory of self-adjoint extensions of semibounded operators”J. Operator Theory 6 (1981), 407.
5. V.I. ArnoldCharacteristic class entering in quantization conditionsFunkcional Anal. i Prilozen. 1 (1967), 1–14. (Russian; English translation in: Functional Anal. Appl. 1 (1967), 1–13; French translation Complément 1 to V.P. Maslov, “Theorie des perturbations et méthodes asymptotiques”, Dunod, Gauthier-Villars, Paris, 1972, 341–361).