@article{10_2140_agt_2009_9_1637,
     author = {Harper, John E},
     title = {Homotopy theory of modules over operads in symmetric spectra},
     journal = {Algebraic and Geometric Topology},
     pages = {1637--1680},
     year = {2009},
     volume = {9},
     number = {3},
     doi = {10.2140/agt.2009.9.1637},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2009.9.1637/}
}