TY  - BOOK
AU  - Heck,Andre
TI  - Necessary and sufficient conditions for a W-graph of a coxeter group
T2  - Report 8649
AV  -  QA3.R46 no.8649 
PY  - 1986///
CY  - Nijmegen
PB  -  : Catholic University, Department of Mathematics
KW  - Graph theory
KW  - W-graphs
N1  - Includes bibliographical references
ER  -