@article{02146813,
title = {Non-Hausdorff groupoids, proper actions and },
journal = {Documenta Mathematica},
volume = {9},
year = {2004},
pages = {565-597},
zbl = {1058.22005},
language = {en},
url = {http://dml.mathdoc.fr/item/02146813}
}
Tu, Jean-Louis. Non-Hausdorff groupoids, proper actions and . Documenta Mathematica, Tome 9 (2004) pp. 565-597. http://gdmltest.u-ga.fr/item/02146813/