@article{CTT100549354,
  author = {E. Shirako and N. Hirayama and Y. Tsukada and T. Tanaka and N. Kitamura},
  title = {Up-regulation of p21CIP1 expression mediated by ERK-dependent and -independent pathways contributes to hepatocyte growth factor-induced inhibition of HepG2 hepatoma cell proliferation},
  journal = {J. Cell. Biochem.},
  year = 2008,
}

@inproceedings{CTT100669158,
  author = {Y. Tsukada and Daisuke Fukuda},
  title = {Comprehensive analysis of toll price elasticity of demand for toll roads: Demonstration projects on flexible charge in Japan},
  booktitle = {Proceedings of the Eastern Asia Society for Transportation Studies},
  year = 2013,
}