@article{MAN_1992__292_2_164927,
     author = {Daowei Ma},
     title = {Upper semicontinuity of isotropy and automorphism groups.},
     journal = {Mathematische Annalen},
     pages = {533--546},
     publisher = {mathdoc},
     volume = {292},
     number = {2},
     year = {1992},
     zbl = {0738.32019},
     url = {http://geodesic.mathdoc.fr/item/MAN_1992__292_2_164927/}
}