@article{1104179148,
author = {Dobrev, V. K.},
title = {New Weyl groups for $A^{(1)}\_1$ and characters of singular highest weight modules},
journal = {Comm. Math. Phys.},
volume = {120},
number = {3},
year = {1989},
pages = { 319-336},
language = {en},
url = {http://dml.mathdoc.fr/item/1104179148}
}
Dobrev, V. K. New Weyl groups for $A^{(1)}_1$ and characters of singular highest weight modules. Comm. Math. Phys., Tome 120 (1989) no. 3, pp. 319-336. http://gdmltest.u-ga.fr/item/1104179148/