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Dyfyniad Arddull ChicagoFerrara, S., R. Gatto, and A. F. Grillo. Conformal Algebra in Space-time and Operator Product Expansion. New York: Springer-Verlag, 1973.
Dyfyniad MLAFerrara, S., et al. Conformal Algebra in Space-time and Operator Product Expansion. Springer-Verlag, 1973.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.