@article{02000804,
title = {Finite subset spaces of graphs and punctured surfaces.},
journal = {Geometry \& Topology},
volume = {7},
year = {2003},
pages = {873-904},
doi = {10.2140/agt.2003.3.873},
zbl = {1032.55014},
language = {en},
url = {http://dml.mathdoc.fr/item/02000804}
}
Tuffley, Christopher. Finite subset spaces of graphs and punctured surfaces.. Geometry & Topology, Tome 7 (2003) pp. 873-904. doi : 10.2140/agt.2003.3.873. http://gdmltest.u-ga.fr/item/02000804/