REFERENCES
- Fabbri , M.A. and Okoh , F. 1999 . Representations of Virasoro-Heisenberg Algebra and Virasoro-Toroidal Algebras . Canad. J. Math. , 51 ( 3 ) : 523 – 545 .
- Fabbri , M.A. and Moody , R.V. 1994 . Irreducible Representations of Virasoro-Toroidal Lie Algebras . Comm. Math. Phys. , 159 : 1 – 13 .
- Eswara Rao , S. and Moody , R.V. 1994 . Vertex Representations for n-Toroidal Lie Algebras and a Generalization of the Virasoro Algebra . Comm. Math. Phys. , 159 : 239 – 264 .
- Kac , V.G. and Raina , A.K. 1987 . Bombay Lectures on Highest Weight Representation of Infinite-Dimensional Lie-Algebras Singapore World Scientific .