Hell, S. W. Department of NanoBiophotonics, MPI for biophysical chemistry, Max Planck Society;
http://journals.aps.org/rmp/pdf/10.1103/RevModPhys.87.1169 (Publisher version)
Hell, S. W. (2015). Nobel lecture: Nanoscopy with freely propagating light. Reviews of Modern Physics, 87(4), 1169-1181. doi:10.1103/RevModPhys.87.1169.