Single-photon exchange quasi-potentials ofN-particle systems

The covariant single-time approach of quantum field theory and perturbation theory are used to construct an explicit form of the electromagnetic interaction operator for mixedN-particle systems consisting of spinor and scalar particles. F. Skoriny State University, Gomelsk. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 9, pp. 13–25, September, 1997.