On the geometry at infinity of the universal covering of Sl(2,ℝ)
Rendiconti del Seminario Matematico della Università di Padova, Tome 104 (2000), pp. 91-108. 
@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://archive.numdam.org/item/RSMUP_2000__104__91_0/}
}
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Salvai, Marcos. On the geometry at infinity of the universal covering of $Sl(2, \mathbb {R})$. Rendiconti del Seminario Matematico della Università di Padova, Tome 104 (2000), pp. 91-108. http://archive.numdam.org/item/RSMUP_2000__104__91_0/

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