%0 Journal Article %A Pieter Roffelsen %T On the Number of Real Roots of the Yablonskii–Vorob'ev Polynomials %J Symmetry, integrability and geometry: methods and applications %D 2012 %V 8 %U http://geodesic.mathdoc.fr/item/SIGMA_2012_8_a98/ %G en %F SIGMA_2012_8_a98