Publisher
Springer Berlin Heidelberg
Reference12 articles.
1. J. Schwinger, Phys. Rev. 76, 790 (1949)
2. W. H. Furry, Phys. Rev. 81, 115 (1951)
3. J. Schwinger, Phys. Rev. 82, 664 (1951)
4. G. Géhéniau and M. Demeur, Physica 17, 71 (1951)
5. G. Géhéniau and F. Villars, Helv. Phys. Acta 23, 178 (1950)