@article{JOLT_1998_8_2_a3,
     author = {E. Casadio Tarabusi and J. M. Cohen and A. Koranyi and M. A. Picardello},
     title = { Converse {Mean} {Value} {Theorems} on {Trees} and {Symmetric} {Spaces}},
     journal = {Journal of Lie Theory},
     pages = {229--254},
     year = {1998},
     volume = {8},
     number = {2},
     zbl = {0947.43005},
     url = {http://geodesic.mathdoc.fr/item/JOLT_1998_8_2_a3/}
}