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@article{MZ_1995__220_1_174816, author = {Thomas A. Schmidt and Mark Sheingorn}, title = {Length spectra of the {Hecke} triangle groups.}, journal = {Mathematische Zeitschrift}, pages = {369--398}, publisher = {mathdoc}, volume = {220}, number = {1}, year = {1995}, zbl = {0840.11019}, url = {http://geodesic.mathdoc.fr/item/MZ_1995__220_1_174816/} }
Thomas A. Schmidt; Mark Sheingorn. Length spectra of the Hecke triangle groups.. Mathematische Zeitschrift, Tome 220 (1995) no. 1, pp. 369-398. http://geodesic.mathdoc.fr/item/MZ_1995__220_1_174816/