@article{CTT100669424,
  author = {Miki Tsutsui and Mika Goto},
  title = {A multi-division efficiency evaluation of U.S. electric power companies using a weighted slacks-based measure},
  journal = {Socio-Economic Planning Sciences},
  year = 2009,
}

@article{CTT100669423,
  author = {Mika Goto and Miki Tsutsui},
  title = {Technical efficiency and impacts of deregulation: An analysis of three functions in U.S. electric power utilities during the period from 1992 through 2000},
  journal = {Energy Economics},
  year = 2008,
}

@article{CTT100669413,
  author = {Mika Goto and Miki Tsutsui},
  title = {Comparison of productive and cost efficiencies among Japanese and US electric utilities},
  journal = {Omega: International Journal of Management Science},
  year = 1998,
}