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Nonperturbative methods in low dimensional quantum field theories . 14 . Johns Hopkins workshop on current problems in particle theory, proceedings : Debrecen, 27.08.90-30.08.90
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Infinite lie algebras and conformal invariance in condensed matter and particle physics : proceedings of the Johns Hopkins Workshop on Current Problems in Particle Theory, 10, Bonn, 1986, September 1 - 3 /
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