%0 Journal Article %A Kostov, Vladimir Petrov %T Polynomials, sign patterns and Descartes' rule of signs %J Mathematica Bohemica %D 2019 %P 39-67 %V 144 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/MB.2018.0091-17/ %R 10.21136/MB.2018.0091-17 %G en %F 10_21136_MB_2018_0091_17