@article{CMH_1975__50_139638,
     author = {I.M. James},
     title = {Homotopy-equivariance.},
     journal = {Commentarii mathematici Helvetici},
     pages = {521--534},
     publisher = {mathdoc},
     volume = {50},
     year = {1975},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMH_1975__50_139638/}
}