@article{10_4064_aa_71_1_11_46,
     author = {Roelof Bruggeman},
     title = {Dedekind sums for {Hecke} groups},
     journal = {Acta Arithmetica},
     pages = {11--46},
     publisher = {mathdoc},
     volume = {71},
     number = {1},
     year = {1995},
     doi = {10.4064/aa-71-1-11-46},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-71-1-11-46/}
}