Hittmair, O. and Schrödinger, E. (1951) Studies in the Generalized Theory of Gravitation II: The Velocity of Light. Communications of the Dublin Institute for Advanced Studies. ISSN Series A (Theoretical Physics) 0070-7414
Schrödinger, E. (1951) Studies in the Non-Symmetric Generalization of the Theory of Gravitation I. Communications of the Dublin Institute for Advanced Studies. ISSN Series A (Theoretical Physics) 0070-7414