@article{JOLT_2014_24_3_a6,
     author = {M. Liao and X. Liu and T.-Y. Tam},
     title = {A {Geometric} {Mean} for {Symmetric} {Spaces} of {Noncompact} {Type}},
     journal = {Journal of Lie Theory},
     pages = {725--736},
     year = {2014},
     volume = {24},
     number = {3},
     zbl = {1331.15011},
     url = {http://geodesic.mathdoc.fr/item/JOLT_2014_24_3_a6/}
}