@article{10_2140_agt_2014_14_1055,
     author = {Dugger, Daniel},
     title = {Coherence for invertible objects and multigraded homotopy rings},
     journal = {Algebraic and Geometric Topology},
     pages = {1055--1106},
     year = {2014},
     volume = {14},
     number = {2},
     doi = {10.2140/agt.2014.14.1055},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2014.14.1055/}
}