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@article{BNYMS_1891__1_186466, author = {F.N. Cole}, title = {Klein's {Modular} {Functions} / {Felix} {Klein} {(Review).}}, journal = {Bulletin of the New York Mathematical Society}, pages = {105--120}, publisher = {mathdoc}, volume = {1}, year = {1891}, url = {http://geodesic.mathdoc.fr/item/BNYMS_1891__1_186466/} }
F.N. Cole. Klein's Modular Functions / Felix Klein (Review).. Bulletin of the New York Mathematical Society, Tome 1 (1891), pp. 105-120. http://geodesic.mathdoc.fr/item/BNYMS_1891__1_186466/