@article{HHA_2009_11_2_a9,
     author = {Tyler Lawson},
     title = {Commutative {\ensuremath{\Gamma}-rings} do not model all commutative ring spectra},
     journal = {Homology, homotopy, and applications},
     pages = {189--194},
     publisher = {mathdoc},
     volume = {11},
     number = {2},
     year = {2009},
     doi = {10.4310/HHA.2009.v11.n2.a9},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4310/HHA.2009.v11.n2.a9/}
}