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@article{MAN_1969__181_161817, author = {E. FRANK}, title = {Continued {Fraction} {Expansions} for {Imaginary} {Quadratic} {Surds.}}, journal = {Mathematische Annalen}, pages = {74--80}, publisher = {mathdoc}, volume = {181}, year = {1969}, zbl = {0162.34801}, url = {http://geodesic.mathdoc.fr/item/MAN_1969__181_161817/} }
E. FRANK. Continued Fraction Expansions for Imaginary Quadratic Surds.. Mathematische Annalen, Tome 181 (1969), pp. 74-80. http://geodesic.mathdoc.fr/item/MAN_1969__181_161817/