TY - JOUR AU - Timothy Rouch TI - Some sufficient conditions for regular approximate differentiability JO - Colloquium Mathematicum PY - 1979 SP - 123 EP - 132 VL - 41 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm-41-1-123-132/ DO - 10.4064/cm-41-1-123-132 LA - en ID - 10_4064_cm_41_1_123_132 ER -