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@article{MAN_1996__305_2_165440, author = {Paul Schmutz}, title = {Systoles of arithmetic surfaces and the {Markoff} spectrum.}, journal = {Mathematische Annalen}, pages = {191--204}, publisher = {mathdoc}, volume = {305}, number = {2}, year = {1996}, zbl = {0853.11054}, url = {http://geodesic.mathdoc.fr/item/MAN_1996__305_2_165440/} }
Paul Schmutz. Systoles of arithmetic surfaces and the Markoff spectrum.. Mathematische Annalen, Tome 305 (1996) no. 2, pp. 191-204. http://geodesic.mathdoc.fr/item/MAN_1996__305_2_165440/