Key points are not available for this paper at this time.
By extending considerations given by Dyson, general rules are obtained for isolating divergent parts from integrals corresponding to overlapping graphs, and a proof is obtained for the appearance of an extra factor Z₁^_^-1 from "b divergences. " In the last section the possibility of renormalization for scalar meson-nucleon interactions is demonstrated.
Abdus Salam (Sun,) studied this question.