Abstract
The path-integral formula for the system of constrained fermionic oscillators interacting with ordinary bosons is put into a simpler and practical form. The consequence is the usual naive path integral with the insertion of a certain determinant factor. The factor is rewritten as a one-loop effect of commuting ghost variables of the Faddeev-Popov type. These results are applied to the minimal electromagnetic interaction of massive spin-3/2 field, and unitary Feynman graph rules are obtained.
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