1. BREIT, G, Theory of scattering of protons by protons, PHYSICAL REVIEW 50: 825 (1936).
2. CASSEN, B, On nuclear forces, PHYSICAL REVIEW 50: 846 (1936).
3. DALITZ, R.H., ON THE ANALYSIS OF TAU-MESON DATA AND THE NATURE OF THE TAU-MESON, PHILOSOPHICAL MAGAZINE 44: 1068 (1953).
4. DIRAC, PAM, A theory of electrons and protons, PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-CONTAINING PAPERS OF A MATHEMATICAL AND PHYSICAL CHARACTER 126: 360 (1930).
5. DIRAC, PAM, Quantised singularities in the electromagnetic field, PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-CONTAINING PAPERS OF A MATHEMATICAL AND PHYSICAL CHARACTER 133: 60 (1931).