TY - JOUR AU - Ewa Ligocka TI - On Dittmar's approach to the Beltrami equation JO - Colloquium Mathematicum PY - 2002 SP - 189 EP - 195 VL - 92 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm92-2-4/ DO - 10.4064/cm92-2-4 LA - en ID - 10_4064_cm92_2_4 ER -