Oa. Khrustalev et Mv. Chichikina, BOGOLIUBOV VARIABLES FOR RELATIVISTICALLY-INVARIANT SYSTEMS, Theoretical and mathematical physics, 111(3), 1997, pp. 723-730
We continue our analysis of relativistically invariant systems and per
form the reduction of the number of field states. Expressions for the
integrals of motion are given in the zeroth order in the inverse power
s of the coupling constant in the form of derivatives with respect to
group variables.