References

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• Wold - Physical Review 35, p 296 (abstract)
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• See, for example, D. Bohm, Quantum Theory, New York, Prentice Hall Inc. (1951) Chapter 22.
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• A. Paris, Proceedings of the Lorentz Kamerlingh Onnes Conference, Layden, June 1953.
• For the treatment of spinors in a unified field theory see W. Pauli, Annalen der Physik, 18. 337 (1933). See also B.S. DeWitt and C.M. DeWitt, Physical Review 87, 116 (1952).
• The Quantum Mechanical Electromagnetic Approach to Gravity, P.L. Carter, Essay on Gravity 1951.
• On Negative Mass in the Theory of Gravitation, Prof. J.M. Luttinger, Essay on Gravity 1951.

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