@article{CTT100697630,
  author = {NOBORU HIDANO and T. Hiramatsu},
  title = {Cost benefit analysis of the sewage improvement projects for household},
  journal = {Environmental Science},
  year = 1992,
}

@article{CTT100697631,
  author = {NOBORU HIDANO and T. Hiramatsu},
  title = {The estimation of the benefit of improvement of drinking water quality},
  journal = {Journal of Japan Water Works Association},
  year = 1992,
}

@article{CTT100697626,
  author = {NOBORU HIDANO and T. Hiramatsu},
  title = {A comparison of contingent and hedonic approach for the estimation of the improvement of river environment},
  journal = {Infrastructure Planning Review},
  year = 1989,
}