@article{10_4153_CMB_2006_012_3,
     author = {Levene, R. H.},
     title = {A {Double} {Triangle} {Operator} {Algebra} {From} {SL} {2(R+)}},
     journal = {Canadian mathematical bulletin},
     pages = {117--126},
     year = {2006},
     volume = {49},
     number = {1},
     doi = {10.4153/CMB-2006-012-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2006-012-3/}
}