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@article{MAN_1913__73_158611, author = {D.R. Curtiss}, title = {An {Extension} of {Descartes'} {Rule} of {Signs.} {(Mit} 1 {Figur} im {Text)}}, journal = {Mathematische Annalen}, pages = {424--435}, publisher = {mathdoc}, volume = {73}, year = {1913}, zbl = {44.0117.01}, url = {http://geodesic.mathdoc.fr/item/MAN_1913__73_158611/} }
D.R. Curtiss. An Extension of Descartes' Rule of Signs. (Mit 1 Figur im Text). Mathematische Annalen, Tome 73 (1913), pp. 424-435. http://geodesic.mathdoc.fr/item/MAN_1913__73_158611/