@article{10_4064_aa_76_3_227_244,
     author = {Marvin Knopp and Mark Sheingorn},
     title = {On {Dirichlet} series and {Hecke} triangle groups of infinite volume},
     journal = {Acta Arithmetica},
     pages = {227--244},
     publisher = {mathdoc},
     volume = {76},
     number = {3},
     year = {1996},
     doi = {10.4064/aa-76-3-227-244},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-76-3-227-244/}
}