TY - JOUR AU - Claudio Bernardi AU - Franco Montagna TI - Equivalence relations induced by extensional formulae: classification by means of a new fixed point property JO - Fundamenta Mathematicae PY - 1984 SP - 221 EP - 233 VL - 124 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm-124-3-221-233/ DO - 10.4064/fm-124-3-221-233 LA - en ID - 10_4064_fm_124_3_221_233 ER -