Irrationality of the Roots of the Yablonskii-Vorob'ev Polynomials and Relations between Them von Roffelsen, P.

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On the Number of Real Roots of the Yablonskii-Vorob'ev Polynomials von Roffelsen, P.

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Poles of Painlevé IV Rationals and their Distribution von Masoero, D., Roffelsen, P.

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