@mastersthesis{sreyus2017sustainable,
  title = {Sustainable transport policy—An evaluation of Singapore’s past, present and future}
  author = {Sreyus Palliyani and Der-Horng Lee},
  url = {https://pdfs.semanticscholar.org/a129/8c34f22d932363733de5c02e31228ca4b89a.pdf},
  year = {2017}
}