1. J.L. Cardy, in Phase transitions and critical phenomena, vol. 11, eds. C. Domb and J.L. Lebowitz (Academic Press, London) to be published.
2. Conformal Invariance, Unitarity, and Critical Exponents in Two Dimensions
3. Vertex operators in mathematics and physics;Friedan,1984
4. Operator content of two-dimensional conformally invariant theories
5. J.L. Cardy, unpublished