%0 Journal Article %A Rezk, Charles %T The units of a ring spectrum and a logarithmic cohomology operation %J Journal of the American Mathematical Society %D 2006 %P 969-1014 %V 19 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-06-00521-2/ %R 10.1090/S0894-0347-06-00521-2 %F 10_1090_S0894_0347_06_00521_2