@article{CM_1971__23_3_329_0,
     author = {James, I. M.},
     title = {Products between homotopy groups},
     journal = {Compositio Mathematica},
     pages = {329--345},
     publisher = {Wolters-Noordhoff Publishing},
     volume = {23},
     number = {3},
     year = {1971},
     mrnumber = {303532},
     zbl = {0218.55020},
     language = {en},
     url = {http://www.numdam.org/item/CM_1971__23_3_329_0/}
}