@article{GDZPPN002340399, title = {Huyghens' principle in Riemannian symmetric spaces.}, journal = {Mathematische Annalen}, volume = {302}, year = {1995}, pages = {445-462}, zbl = {0822.43002}, url = {http://dml.mathdoc.fr/item/GDZPPN002340399} }
Branson, T.; Olafsson, G. Huyghens' principle in Riemannian symmetric spaces.. Mathematische Annalen, Tome 302 (1995) pp. 445-462. http://gdmltest.u-ga.fr/item/GDZPPN002340399/