@article{Sandvik1991,
  author  = {A. W. Sandvik and J. Kurkij{\"a}rvi},
  title   = {Quantum {M}onte {C}arlo simulation method for spin systems},
  journal = {Phys. Rev. B},
  volume  = {43},
  pages   = {5950},
  year    = {1991},
  doi     = {10.1103/PhysRevB.43.5950},
}