TY - JOUR AU - Dey, I. M. S. TI - Schreier systems in free products JO - Glasgow mathematical journal PY - 1965 SP - 61 EP - 79 VL - 7 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.1017/S204061850003522X/ DO - 10.1017/S204061850003522X ID - 10_1017_S204061850003522X ER -