TY - JOUR AU - L. HÄ…cia TI - On approximate solution on integral equations in the space-time JO - Commentationes Mathematicae PY - 1981 SP - 239 EP - 243 VL - 22 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.14708/cm.v22i2.6020/ DO - 10.14708/cm.v22i2.6020 LA - pl ID - 10_14708_cm_v22i2_6020 ER -