TY - JOUR AU - Tyler Lawson TI - Commutative Γ-rings do not model all commutative ring spectra JO - Homology, homotopy, and applications PY - 2009 SP - 189 EP - 194 VL - 11 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4310/HHA.2009.v11.n2.a9/ DO - 10.4310/HHA.2009.v11.n2.a9 LA - en ID - HHA_2009_11_2_a9 ER -