TY - JOUR TI - On Zeros of Derivatives of Polynomials JO - Canadian mathematical bulletin PY - 1968 SP - 611 EP - 611 VL - 11 IS - 4 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1968-077-6/ DO - 10.4153/CMB-1968-077-6 ID - 10_4153_CMB_1968_077_6 ER -