@article{JLT_2007_17_4_JLT_2007_17_4_a4,
     author = {I. Pacharoni and J. Tirao},
     title = {Three {Term} {Recursion} {Relation} for {Spherical} {Functions} {Associated} to the {Complex} {Hyperbolic} {Plane}},
     journal = {Journal of Lie theory},
     pages = {791--828},
     year = {2007},
     volume = {17},
     number = {4},
     url = {http://geodesic.mathdoc.fr/item/JLT_2007_17_4_JLT_2007_17_4_a4/}
}