References:
[1] J. Lepowsky and R. Wilson,
"Z-algebras and the Rogers-Ramanujan identities", in:
Vertex operators in mathematics and physics, Proc. 1983 M.S.R.I. conference, ed. by J. Lepowsky, S. Mandelstam and I. M. Singer,
Publ. Math. Sciences Res. Inst. #3, Springer-Verlag, 1985, 97-142.
[2] J. Lepowsky and R. Wilson,
"The structure of standard modules, I: Universal algebras and the Rogers-Ramanujan identities",
Invent. Math. 77 (1984), 199-290.
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article]
[3] J. Lepowsky,
"Affine Lie algebras and combinatorial identities",
Proc. 1981 Rutgers Conference on Lie Algebras and Related Topics, Springer-Verlag Lecture Notes in Mathematics 933, (1982), 130-156.