TY - JOUR AU - Bruckner, A. M. AU - Leonard, John L. TI - On Differentiable Functions having an Everywhere Dense set of Intervals of Constancy JO - Canadian mathematical bulletin PY - 1965 SP - 73 EP - 76 VL - 8 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1965-009-1/ DO - 10.4153/CMB-1965-009-1 ID - 10_4153_CMB_1965_009_1 ER -