TY - JOUR AU - Nick Kassimatis TI - Bass and Serre theory and Nielsen transformations (free and free product case) JO - Ευκλείδης Γ PY - 1990 SP - 39 EP - 46 VL - 27 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EUG_1990__27_a3/ LA - gr ID - EUG_1990__27_a3 ER -