[62] K. REIDEMEISTER, 'Homotopieringe und Linsenräume', Abh. Math. Sem. Univ. Hamburg 11(1) (1935), 102-109. MR 3069647

[63] J. ROE, *Elliptic Operators, Topology and Asymptotic Methods*, second edn., Pitman Research Notes in Mathematics, vol. 395 (Longman, Harlow, 1998). MR 1670907

[64] M. SCHWARZ, *Morse Homology*, Progress in Mathematics, vol. 111 (Birkhäuser Verlag, Basel, 1993). MR 1239174

[65] M. SCHWARZ, 'Equivalences for Morse homology', in *Geometry and Topology in Dynamics (Winston-Salem, NC, 1998/San Antonio, TX, 1999)*, Contemporary Mathematics, vol. 246 (American Mathematical Society, Providence, RI, 1999), 197-216. MR 1732382

[66] R. T. SEELEY, Complex powers of an elliptic operator', *Singular Integrals (Proc. Sympos. Pure Math., Chicago, Ill., 1966)*, vol. 10 (Amer. Math. Soc., Providence, RI, 1967), 288-307. MR 0237943

[67] S. SMALE, 'The generalized Poincaré conjecture in higher dimensions', *Bull. Amer. Math. Soc.* **66** (1960), 373-375. MR 124912

[68] S. SMALE, 'Morse inequalities for a dynamical system', *Bull. Amer. Math. Soc.* **66** (1960), 43-49. MR 117745

[69] S. SMALE, 'On gradient dynamical systems', *Ann. of Math. (2)* **74** (1961), 199-206. MR 0133139

[70] S. SMALE, 'Stable manifolds for differential equations and diffeomorphisms', *Ann. Scuola Norm. Sup. Pisa (3)* **17**(1-2) (1963), 97-116. MR 0165537

[71] R. THOM, 'Sur une partition en cellules associée à une fonction sur une variété', *C. R. Acad. Sci. Paris* **228** (1949), 973-975. MR 29160

[72] H. WHITNEY, 'Local properties of analytic varieties', in *Differential and Combinatorial Topology (A Symposium in Honor of Marston Morse)* (Princeton Univ. Press, Princeton, NJ, 1965), 205-244. MR 188486

[73] H. WHITNEY, 'Tangents to an analytic variety', *Annals of Math.* **81** (1965), 496-549. MR 192520

[74] E. WITTEN, 'Supersymmetry and Morse theory', *J. Differ. Geom.* **17** (1982), 661-692. MR 683171

[75] W. ZHANG, *Lectures on Chern-Weil Theory and Witten Deformations*, Nankai Tracts in Mathematics, vol. 4 (World Scientific Publishing Co., Inc., River Edge, NJ, 2001). MR 1864735