1. L.I. Schiff, Quantum Mechanics (McGraw-Hill, New York, USA, 1949)
2. G. Gamov, Nature 122, 805 (1928)
3. R.P. Feynman, A.R. Hibbs, Quantum Mechanics and Path Integrals (McGraw-Hill, New York, USA, 1965)
4. G.A. Voth, Adv. Chem. Phys. 93 135 (1996)
5. J.C. Tully, Annu. Rev. Phys. Chem. 51, 153 (2000)