@article{CMH_1956__30_139131,
     author = {P.J. Hilton and J.F. Adams},
     title = {On the chain algebra of a loop space.},
     journal = {Commentarii mathematici Helvetici},
     pages = {305--330},
     publisher = {mathdoc},
     volume = {30},
     year = {1956},
     zbl = {0071.16403},
     url = {http://geodesic.mathdoc.fr/item/CMH_1956__30_139131/}
}