@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/}
}