@Conference{charles.11g,
  author = 	 {Charles, A. and Rozell, C.},
  title = 	 {A Hierarchical Re-weighted-l1 Approach for Dynamic Sparse Signal Estimation},
  booktitle =	 {Signal Processing with Adaptive Sparse Structured Representations (SPARS) Workshop},
  year =	 2011,
  address =	 {Edinburgh, Scotland},
  month =	 {June}
}