@article{10_4153_CJM_2004_043_7,
     author = {Helminck, Aloysius G. and Schwarz, Gerald W.},
     title = {Smoothness of {Quotients} {Associated} {With} a {Pair} of {Commuting} {Involutions}},
     journal = {Canadian journal of mathematics},
     pages = {945--962},
     year = {2004},
     volume = {56},
     number = {5},
     doi = {10.4153/CJM-2004-043-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2004-043-7/}
}