@article{701888,
     title = {Characters of the irreducible highest weight modules over the virasoro and super-virasoro algebras},
     booktitle = {Proceedings of the 14th Winter School on Abstract Analysis},
     series = {GDML\_Books},
     publisher = {Circolo Matematico di Palermo},
     address = {Palermo},
     year = {1987},
     pages = {[25]-42},
     mrnumber = {MR0920844},
     zbl = {0643.17010},
     url = {http://dml.mathdoc.fr/item/701888}
}

Dobrev, V. K. Characters of the irreducible highest weight modules over the virasoro and super-virasoro algebras, dans Proceedings of the 14th Winter School on Abstract Analysis, GDML_Books,  (1987), pp. [25]-42. http://gdmltest.u-ga.fr/item/701888/