@article{01985398,
title = {Generalized orbifold Euler characteristics of symmetric orbifolds and covering spaces.},
journal = {Geometry \& Topology},
volume = {7},
year = {2003},
pages = {791-856},
doi = {10.2140/agt.2003.3.791},
zbl = {1037.57022},
language = {en},
url = {http://dml.mathdoc.fr/item/01985398}
}
Tamanoi, Hirotaka. Generalized orbifold Euler characteristics of symmetric orbifolds and covering spaces.. Geometry & Topology, Tome 7 (2003) pp. 791-856. doi : 10.2140/agt.2003.3.791. http://gdmltest.u-ga.fr/item/01985398/