@article{10_2140_agt_2016_16_1203,
     author = {Sagave, Steffen},
     title = {Spectra of units for periodic ring spectra and group completion of graded {E\ensuremath{\infty}} spaces},
     journal = {Algebraic and Geometric Topology},
     pages = {1203--1251},
     year = {2016},
     volume = {16},
     number = {2},
     doi = {10.2140/agt.2016.16.1203},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2016.16.1203/}
}