TY  - JOUR
AU  - Iliev, Valentin
TI  - On a New Approach to Williamson's Generalization of Pólya's Enumeration Theorem
JO  - Serdica Mathematical Journal
PY  - 2000
SP  - 155
EP  - 166
VL  - 26
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SMJ2_2000_26_2_a5/
LA  - en
ID  - SMJ2_2000_26_2_a5
ER  -