@article{MAN_1990__286_1-3_164637,
     author = {Friedrich Hirzebruch and Thomas H\"ofer},
     title = {On the {Euler} number of an orbifold.},
     journal = {Mathematische Annalen},
     pages = {255--260},
     publisher = {mathdoc},
     volume = {286},
     number = {1-3},
     year = {1990},
     zbl = {0679.14006},
     url = {http://geodesic.mathdoc.fr/item/MAN_1990__286_1-3_164637/}
}