@article{CML_2018__10_2_75_0,
     author = {Parkkonen, Jouni and Paulin, Fr\'ed\'eric},
     title = {A classification of $\protect \mathbb{R}${-Fuchsian} subgroups of {Picard} modular groups},
     journal = {Confluentes Mathematici},
     pages = {75--92},
     publisher = {Institut Camille Jordan},
     volume = {10},
     number = {2},
     year = {2018},
     doi = {10.5802/cml.51},
     mrnumber = {3928225},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/cml.51/}
}