%0 Journal Article %A Fabbri, Marc A. %A Okoh, Frank %T Representations of Virasoro-Heisenberg Algebras and Virasoro-Toroidal Algebras %J Canadian journal of mathematics %D 1999 %P 523-545 %V 51 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1999-024-x/ %R 10.4153/CJM-1999-024-x %F 10_4153_CJM_1999_024_x