Schwinger, Julian On the Green’s functions of quantized fields. I. II. (English) Zbl 0044.43001 Proc. Natl. Acad. Sci. USA 37, 452-455, 455-459 (1951). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 12 Documents Keywords:quantum theory PDF BibTeX XML OpenURL