1. H. Araki, ?Factorizable representations of current algebras,? Publ. Res. Inst. Math. Sci. Ser. A,5, No. 3, 361?422 (1970).
2. A. M. Vershik, I. M. Gelfand, and M. I. Graev, ?Representations of the groupSL(2,R), whereR is a ring of functions,? Usp. Mat. Nauk,29, No. 3, 3?41 (1974).
3. A. M. Vershik, I. M. Gelfand, and M. I. Graev, ?Irreducible representations of the groupG X and cohomology,? Funkts. Anal. Prilozhen.,8, No. 2, 67?69 (1974).
4. K. Parthasarathy and K. Schmidt, ?Factorizable representations of current groups and the Araki?Woods imbedding theorem,? Acta Math.,128, 53?71 (1972).
5. P. Delorme, ?Irreducibilité de certaines représentations deG X,? J. Funct. Anal.,30, 36?47 (1978).