@article{White1993,
  author  = {S. R. White},
  title   = {Density-matrix algorithms for quantum renormalization groups},
  journal = {Phys. Rev. B},
  volume  = {48},
  pages   = {10345},
  year    = {1993},
  doi     = {10.1103/PhysRevB.48.10345},
}