TY - JOUR AU - Voutsadakis, George TI - Categorical Abstract Logic: Hidden Multi-Sorted Logics as Multi-Term π-Institutions JO - Bulletin of the Section of Logic PY - 2016 VL - 45 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/BSL_2016_45_2_a2/ LA - en ID - BSL_2016_45_2_a2 ER -