@article{SE_1963__5__A2_0,
     author = {Berstein, I. and Hilton, P. J.},
     title = {Homomorphisms of homotopy structures},
     journal = {S\'eminaire Ehresmann. Topologie et g\'eom\'etrie diff\'erentielle},
     note = {talk:2},
     pages = {1--24},
     publisher = {Secr\'etariat math\'ematique},
     volume = {5},
     year = {1963},
     mrnumber = {203725},
     zbl = {0145.43402},
     language = {en},
     url = {http://www.numdam.org/item/SE_1963__5__A2_0/}
}