Footnotes
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This research has been sponsored in part by the Air Force Office of Scientific Research through the European Office of Aerospace Research, OAR, United States Air Force, under contract F61052 67 C 0084.
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Parisi, G., Testa, M. Broken scale invariance,U 3⊗U 3 breaking and hadron Lagrangian structure. Lett. Nuovo Cimento 1, 549–552 (1971). https://doi.org/10.1007/BF02789741
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DOI: https://doi.org/10.1007/BF02789741