1. Pronko G. P.,Rev. Math. Phys.,2 (1990) 355.
2. Rohrlich F.,Phys. Rev. Lett.,34 (1975) 842.
3. Del E. Giudice, Di Vecchia P. andFubini A.,Ann. Phys.,70 (1972) 378.
4. Pervushin V. N. andKhvedelidze A. M.,Gaugeless quantization of constrained systems, inProceedings of Seminars in memory of Blokhintsev D. I. (JINR, Dubna) 1995, pp. 104–132.
5. Zheltuhin A. A.,Sov. J. Nucl. Phys.,34 (1981) 562.