@article{Prokofev1998,
  author  = {N. V. Prokof'ev and B. V. Svistunov and I. S. Tupitsyn},
  title   = {Exact, Complete and Universal Continuous-Time Worldline {M}onte {C}arlo Approach to the Statistics of Discrete Quantum Systems},
  journal = {Phys. Lett. A},
  volume  = {238},
  pages   = {253},
  year    = {1998},
  doi     = {10.1016/S0375-9601(97)00957-2},
  eprint  = {cond-mat/9703200},
}