1. M. J. Gotay, Int. Theor. Phys. (1980) 19, 139.
2. M. J. Gotay, Obstructions to quantization, in The Juan Simo Memorial Volume, eds. J. E. Marsden and S. Wiggins (Springer, New York, 1999); mathph/9809011.
3. V. I. Arnold and A. B. Givental, Symplectic Geometry. In: Dynamical Systems IV, Encyclopedia of Mathematical Sciences 4 (Springer-Verlag, 1985).
4. E. Schrödinger, Ann. d. Physik 79, 734 (1926).
5. E. Schrödinger, Ann. d. Physik 79, 361 (1926); ibid. 79, 489, 734; ibid. 80, 437; ibid 81, 109 (1926).