Walls, « A simple field theoretic description of photon interference », American Journal of Physics, American Association of Physics Teachers (AAPT), vol. 45, no 10, , p. 952–956 (ISSN0002-9505, DOI10.1119/1.10857)
(en) Knight et Milburn, « Daniel Frank Walls FRSNZ. 13 September 1942 — 12 May 1999 », Biographical Memoirs of Fellows of the Royal Society, vol. 61, , p. 531–540 (ISSN0080-4606, DOI10.1098/rsbm.2014.0019, lire en ligne)
Walls, « A simple field theoretic description of photon interference », American Journal of Physics, American Association of Physics Teachers (AAPT), vol. 45, no 10, , p. 952–956 (ISSN0002-9505, DOI10.1119/1.10857)
(en) Knight et Milburn, « Daniel Frank Walls FRSNZ. 13 September 1942 — 12 May 1999 », Biographical Memoirs of Fellows of the Royal Society, vol. 61, , p. 531–540 (ISSN0080-4606, DOI10.1098/rsbm.2014.0019, lire en ligne)
(en) Knight et Milburn, « Daniel Frank Walls FRSNZ. 13 September 1942 — 12 May 1999 », Biographical Memoirs of Fellows of the Royal Society, vol. 61, , p. 531–540 (ISSN0080-4606, DOI10.1098/rsbm.2014.0019, lire en ligne)