Baker, Andrew J. Max Planck Institute for Mathematics, Max Planck Society;
Richter, Birgit Max Planck Institute for Mathematics, Max Planck Society;
Baker, A. J., & Richter, B. (2008). Uniqueness of E-infinity structures for connective covers. Proceedings of the American Mathematical Society, 136, 707-714. doi:10.1090/S0002-9939-07-08984-8.