TY - JOUR AU - Sagave, Steffen TI - Spectra of units for periodic ring spectra and group completion of graded E∞ spaces JO - Algebraic and Geometric Topology PY - 2016 SP - 1203 EP - 1251 VL - 16 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.2140/agt.2016.16.1203/ DO - 10.2140/agt.2016.16.1203 ID - 10_2140_agt_2016_16_1203 ER -