théorie du champ unifié
1974 / Two letters from Einstein concerning his distant parallelism field theory / Herbert E. Salzer / Archive for history of exact sciences 12 (1974) p. 89 [doi]
1979 / Equivalence of Einstein's 1925 unified field theory and his relativistic theory of the nonsymmetric field / Coates R. Johnson / American Journal of Physics 47 (1979) p. 425 [doi]
2004 / Einstein et la théorie unitaire : 40 ans de perdus ? / Catherine Goldstein ; Jim Ritter / Pour la Science 326 (2004) p. 126 [lien]
2004 / On the History of Unified Field Theories / Hubert F.M. Goenner / Living Reviews in Relativity 7 (2004) p. 1 [doi]
2014 / On the History of Unified Field Theories. Part II. (ca. 1930 – ca. 1965) / Hubert F. M. Goenner / Living Reviews in Relativity 17 (2014) p. 5 [doi]