TY - JOUR AU - James, I. M. TI - Products between homotopy groups JO - Compositio Mathematica PY - 1971 SP - 329 EP - 345 VL - 23 IS - 3 PB - Wolters-Noordhoff Publishing UR - http://www.numdam.org/item/CM_1971__23_3_329_0/ LA - en ID - CM_1971__23_3_329_0 ER -