@article{MZ_1994__215_1_174595,
     author = {Raimund Blache},
     title = {Positivity results for {Euler} characteristics of singular surfaces.},
     journal = {Mathematische Zeitschrift},
     pages = {1--12},
     publisher = {mathdoc},
     volume = {215},
     number = {1},
     year = {1994},
     zbl = {0798.14021},
     url = {http://geodesic.mathdoc.fr/item/MZ_1994__215_1_174595/}
}