TY - JOUR AU - Hans Volkmer TI - Extending Peano derivatives: necessary and sufficient conditions JO - Fundamenta Mathematicae PY - 1999 SP - 219 EP - 229 VL - 159 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm-159-3-219-229/ DO - 10.4064/fm-159-3-219-229 LA - en ID - 10_4064_fm_159_3_219_229 ER -