@article{10_2140_agt_2004_4_781,
     author = {Christensen, J Daniel and Isaksen, Daniel C},
     title = {Duality and {Pro-Spectra}},
     journal = {Algebraic and Geometric Topology},
     pages = {781--812},
     year = {2004},
     volume = {4},
     number = {2},
     doi = {10.2140/agt.2004.4.781},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2004.4.781/}
}