Walls, D. F. (1977). "A simple field theoretic description of photon interference". American Journal of Physics. 45 (10). American Association of Physics Teachers (AAPT): 952–956. Bibcode:1977AmJPh..45..952W. doi:10.1119/1.10857. ISSN0002-9505.
Walls, D. F. (1977). "A simple field theoretic description of photon interference". American Journal of Physics. 45 (10). American Association of Physics Teachers (AAPT): 952–956. Bibcode:1977AmJPh..45..952W. doi:10.1119/1.10857. ISSN0002-9505.
Walls, D. F. (1977). "A simple field theoretic description of photon interference". American Journal of Physics. 45 (10). American Association of Physics Teachers (AAPT): 952–956. Bibcode:1977AmJPh..45..952W. doi:10.1119/1.10857. ISSN0002-9505.