@article{article98737abf,
title   = {The classification of simply-connected contact sub-Riemannian symmetric spaces},
author = {Bieliavsky, Pierre and Falbel, Elisha and Gorodski, Claudio},
year = {1999},
doi = {10.2140/pjm.1999.188.65},
journal   = {Pacific Journal of Mathematics}
}