@article{10_4171_emss_4_1_1,
     author = {Boris Pasquier},
     title = {A survey on the singularities of spherical varieties},
     journal = {EMS surveys in mathematical sciences},
     pages = {1--19},
     year = {2017},
     volume = {4},
     number = {1},
     doi = {10.4171/emss/4-1-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/emss/4-1-1/}
}