@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},
     mrnumber = {1809352},
     zbl = {1025.53020},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_2000__104__91_0/}
}