TY - JOUR AU - Goeffrey Fox AU - Pedro Morales TI - Extension of group-valued set functions defined on lattices JO - Fundamenta Mathematicae PY - 1983 SP - 143 EP - 155 VL - 116 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm-116-3-143-155/ DO - 10.4064/fm-116-3-143-155 LA - en ID - 10_4064_fm_116_3_143_155 ER -