1. E. P. Wigner,Phys. Rev.,40, 749 (1999).
2. O. I. Zavialov and A. M. Malokostov,Theor. Math. Phys.,119, 448 (1999).
3. O. I. Zavialov and V. N. Sushko, “Nonequivalent representations of commutation relations in the physics of infinite-dimensional systems,” in:Statistical Physics and Quantum Field Theory (N. N. Bogoliubov, ed.) [in Russian], Nauka, Moscow (1973), p. 411.
4. O. I. Zavialov and V. N. Sushko,Teor. Mat. Fiz.,1, 153 (1969).
5. J. von Neumann,Mathematische Grundlagen der Quantenmechanik, Springer, Berlin (1932).