Schwinger, Julian (15 September 1949). "Quantum Electrodynamics. III. The Electromagnetic Properties of the Electron—Radiative Corrections to Scattering". Physical Review. 76 (6). American Physical Society (APS): 790–817. Bibcode:1949PhRv...76..790S. doi:10.1103/physrev.76.790. ISSN0031-899X.
Koba, Z.; Tomonaga, S.-i. (1 August 1948). "On Radiation Reactions in Collision Processes. I: Application of the "Self-Consistent" Subtraction Method to the Elastic Scattering of an Electron". Progress of Theoretical Physics. 3 (3). Oxford University Press (OUP): 290–303. Bibcode:1948PThPh...3..290K. doi:10.1143/ptp/3.3.290. ISSN0033-068X.
Schwinger, Julian (15 September 1949). "Quantum Electrodynamics. III. The Electromagnetic Properties of the Electron—Radiative Corrections to Scattering". Physical Review. 76 (6). American Physical Society (APS): 790–817. Bibcode:1949PhRv...76..790S. doi:10.1103/physrev.76.790. ISSN0031-899X.
Koba, Z.; Tomonaga, S.-i. (1 August 1948). "On Radiation Reactions in Collision Processes. I: Application of the "Self-Consistent" Subtraction Method to the Elastic Scattering of an Electron". Progress of Theoretical Physics. 3 (3). Oxford University Press (OUP): 290–303. Bibcode:1948PThPh...3..290K. doi:10.1143/ptp/3.3.290. ISSN0033-068X.
Daniel Greenberger, Klaus Hentschel, Friedel Weinert (eds.), Compendium of Quantum Physics: Concepts, Experiments, History and Philosophy, Springer, 2009: "Quantization (First, Second)".
Schwinger, Julian (15 September 1949). "Quantum Electrodynamics. III. The Electromagnetic Properties of the Electron—Radiative Corrections to Scattering". Physical Review. 76 (6). American Physical Society (APS): 790–817. Bibcode:1949PhRv...76..790S. doi:10.1103/physrev.76.790. ISSN0031-899X.
Koba, Z.; Tomonaga, S.-i. (1 August 1948). "On Radiation Reactions in Collision Processes. I: Application of the "Self-Consistent" Subtraction Method to the Elastic Scattering of an Electron". Progress of Theoretical Physics. 3 (3). Oxford University Press (OUP): 290–303. Bibcode:1948PThPh...3..290K. doi:10.1143/ptp/3.3.290. ISSN0033-068X.