@article{10_4153_CMB_2015_033_8,
     author = {Aulaskari, Rauno and Chen, Huaihui},
     title = {On {Classes} for {Hyperbolic} {Riemann} {Surfaces}},
     journal = {Canadian mathematical bulletin},
     pages = {13--29},
     year = {2016},
     volume = {59},
     number = {1},
     doi = {10.4153/CMB-2015-033-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2015-033-8/}
}