@article{CTT100757526,
  author = {Mika Goto and Toshifumi Takahashi},
  title = {Operational and environmental efficiencies of Japanese electric power companies from 2003 to 2015: Influence of market reform and Fukushima nuclear power accident},
  journal = {Mathematical Problems in Engineering, Hindawi},
  year = 2018,
}

@inproceedings{CTT100753131,
  author = {高橋 俊史 and 後藤 美香},
  title = {我が国の電力送変配電部門のDEAによる効率性評価},
  booktitle = {2017年秋季研究発表会アブストラクト集},
  year = 2017,
}