@article{10_2140_agt_2006_6_1785,
     author = {Dugger, Daniel and Shipley, Brooke},
     title = {Postnikov extensions of ring spectra},
     journal = {Algebraic and Geometric Topology},
     pages = {1785--1829},
     year = {2006},
     volume = {6},
     number = {4},
     doi = {10.2140/agt.2006.6.1785},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2006.6.1785/}
}