@article{aharonov_massar_popescu_2002, 
  title={Measuring energy, estimating Hamiltonians, and the time-energy uncertainty relation}, 
  volume={66}, 
  DOI={10.1103/physreva.66.052107}, 
  publisher={American Physical Society (APS)}, 
  author={Aharonov and Massar and Popescu}, 
  year={2002}, 
  month={Nov}
  }