@article{GT_2018_22_4_a9,
     author = {Lou, Beicheng and Tan, Ser and Vo, Anh Duc},
     title = {Hyperbolic jigsaws and families of pseudomodular groups, {I}},
     journal = {Geometry & topology},
     pages = {2339--2366},
     publisher = {mathdoc},
     volume = {22},
     number = {4},
     year = {2018},
     doi = {10.2140/gt.2018.22.2339},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2018.22.2339/}
}