I liked being directed to this paper: THE GREENING OF QUANTUM FIELD THEORY GEORGE AND I* Julian Schwinger University of California, Los Angeles, CA 90024-1547

I liked being directed to this paper: THE GREENING OF QUANTUM FIELD THEORY GEORGE AND I* Julian Schwinger University of California, Los Angeles, CA 90024-1547 https://arxiv.org/pdf/hep-ph/9310283.pdf https://arxiv.org/pdf/hep-ph/9310283.pdf