@article{AFM_2006_31_2_a8,
     author = {Xiaonan Li and Fernando P\'erez-Gonz\'alez and Jouni R\"atty\"a},
     title = {Composition operators in hyperbolic {Q-classes}},
     journal = {Annales Fennici Mathematici},
     pages = {391--404},
     publisher = {mathdoc},
     volume = {31},
     number = {2},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_2006_31_2_a8/}
}