@article{HHA_2001_3_2_a4,
     author = {P. Hu and I. Kriz and J. P. May},
     title = {Cores of spaces, spectra, and $E_{\infty}$ ring spectra},
     journal = {Homology, homotopy, and applications},
     pages = {341--354},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {2001},
     doi = {10.4310/HHA.2001.v3.n2.a3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4310/HHA.2001.v3.n2.a3/}
}