@article{hallberg2006,
  author = {Hallberg, K. A.},
  title = {{New Trends in Density Matrix Renormalization}},
  journal = {Advances in Physics},
  volume = {55},
  number = {5–6},
  pages = {477--526},
  year = {2006},
  doi = {10.1080/00018730600766432}
}