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. Friedberg R, Lee T D. Ann. Phys., 2008, 323: 10872. Particle Data Group. J. Phys. G, 2006, 33: 13. Friedberg R, Lee T D. arXiv:0809.36334. Goldstone J. Nuovo Cimento, 1961, 9: 154
. Friedberg R, Lee T D. Ann. Phys., 2008, 323: 10872. Particle Data Group. J. Phys. G, 2006, 33: 13. Friedberg R, Lee T D. arXiv:0809.36334. Goldstone J. Nuovo Cimento, 1961, 9: 154