@inproceedings{CTT100666884,
  author = {Shinya HANAOKA and Tomoya KAWASAKI and Hironori Kawai},
  title = {Classification of the type of inland freight transport in landlocked countries},
  booktitle = {},
  year = 2013,
}

@inproceedings{CTT100642795,
  author = {Kawai, H. and Hanaoka, S. and Kawasaki, T.},
  title = {Characteristics of international freight transport in landlocked countries},
  booktitle = {土木計画学研究・講演集},
  year = 2011,
}