@article{DOCMA_2011__16__a25,
     author = {Fiore, Thomas M. and L\"uck, Wolfgang and Sauer, Roman},
     title = {Euler characteristics of categories and homotopy colimits},
     journal = {Documenta mathematica},
     pages = {301--354},
     publisher = {mathdoc},
     volume = {16},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DOCMA_2011__16__a25/}
}