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@article{CMH_1955__29_139107, author = {Mario Howald}, title = {Die akzessorische {Irrationalit\"at} der {Gleichung} f\"unften {Grades.}}, journal = {Commentarii mathematici Helvetici}, pages = {279--297}, publisher = {mathdoc}, volume = {29}, year = {1955}, zbl = {0065.25001}, url = {http://geodesic.mathdoc.fr/item/CMH_1955__29_139107/} }
Mario Howald. Die akzessorische Irrationalität der Gleichung fünften Grades.. Commentarii mathematici Helvetici, Tome 29 (1955), pp. 279-297. http://geodesic.mathdoc.fr/item/CMH_1955__29_139107/