Haltmeier, M. Research Group of Statistical Inverse-Problems in Biophysics, MPI for biophysical chemistry, Max Planck Society;
http://onlinelibrary.wiley.com/doi/10.1002/cpa.20350/pdf (Publisher version)
Grasmaier, M., Haltmeier, M., & Scherzer, O. (2010). Necessary and sufficient conditions for linear convergence of ℓ1-regularization. Communications on Pure and Applied Mathematics, 64(2), 161-182.