@article{JLT_2005_15_2_JLT_2005_15_2_a5,
     author = {M. Kankaanrinta },
     title = {Lifting {Smooth} {Homotopies} of {Orbit} {Spaces} of {Proper} {Lie} {Group} {Actions}},
     journal = {Journal of Lie theory},
     pages = {447--456},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {2005},
     url = {http://geodesic.mathdoc.fr/item/JLT_2005_15_2_JLT_2005_15_2_a5/}
}