Ia. Batalin et Iv. Tyutin, ON THE EQUIVALENCE BETWEEN THE UNIFIED AND STANDARD VERSIONS OF CONSTRAINT DYNAMICS, Modern physics letters A, 8(39), 1993, pp. 3757-3765
The structure of physical operators and states of the unified constrai
nt dynamics is studied. The genuine second class constraints encoded a
re shown to be the superselection operators. The unified constrained d
ynamics is established to be physically-equivalent to the standard BFV
-formalism with constraints split.