@article{CTT100703357,
  author = {Fumihiro Wakai and Kouta Katsura and Shun Kanchika and Yutaka Shinoda and Takashi Akatsu and Kazunari Shinagawa},
  title = {Sintering force behind the viscous sintering of two particles},
  journal = {Acta Materialia},
  year = 2016,
}

@article{CTT100681988,
  author = {K. Katsura and Y. Shinoda and T. Akatsu and F. Wakai},
  title = {Sintering force behind shape evolution by viscous flow},
  journal = {Journal of the European Ceramic Society},
  year = 2015,
}