%0 Journal Article %A Harper, John E %T Homotopy theory of modules over operads in symmetric spectra %J Algebraic and Geometric Topology %D 2009 %P 1637-1680 %V 9 %N 3 %U http://geodesic.mathdoc.fr/articles/10.2140/agt.2009.9.1637/ %R 10.2140/agt.2009.9.1637 %F 10_2140_agt_2009_9_1637