@article{RSMUP_2000__104__91_0, author = {Salvai, Marcos}, title = {On the geometry at infinity of the universal covering of $Sl(2, \mathbb {R})$}, journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova}, pages = {91--108}, publisher = {Seminario Matematico of the University of Padua}, volume = {104}, year = {2000}, zbl = {1025.53020}, mrnumber = {1809352}, language = {en}, url = {http://archive.numdam.org/item/RSMUP_2000__104__91_0/} }