Olive, David I.: Kac-Moody algebras: An introduction for physicists.
(English).
In:
Frolík, Z., Souček, V.
and Vinárek, J. (eds.): Proceedings of the Winter School "Geometry and Physics".
Circolo Matematico di Palermo, Palermo, 1985.
pp. [177]-198
Kent, Adrian: Unitary representations of the Virasoro algebra.
(English).
In:
Frolík, Z., Souček, V.
and Vinárek, J. (eds.): Proceedings of the Winter School "Geometry and Physics".
Circolo Matematico di Palermo, Palermo, 1985.
pp. [129]-135