@article{CTT100715620,
  author = {R. Yukawa and S. Yamamoto and K. Ozawa and M. Emori and M. Ogawa and Sh. Yamamoto and K. Fujikawa and R. Hobara and S. Kitagawa and Hiroshi Daimon and H. Sakama and I. Matsuda},
  title = {Electron-hole recombination on ZnO(0001) single-crystal surface studied by time-resolved soft X-ray photoelectron spectroscopy},
  journal = {Applied Physics Letters},
  year = 2014,
}

@article{CTT100715609,
  author = {R. Yukawa and S. Yamamoto and K. Ozawa and M. D'Angelo and Manami Ogawa and M.G. Silly and F. Sirotti and I. Matsuda},
  title = {Electronic structure of the hydrogen-adsorbed SrTiO3(001) surface studied by polarization-dependent photoemission spectroscopy},
  journal = {Physical Review B},
  year = 2013,
}

@inproceedings{CTT100786742,
  author = {Akiko Makabe and Keisuke Koba and Chikage Yoshimizu and I.chiro Tayasu and N. O. Ogawa and Naohiko Ohkouchi and Sakae Toyoda and Naohiro Yoshida and Toshi Nagata},
  title = {Fate of atmospheric nitrate and nitrogen biogeochemical processes in Lake Biwa elucidated by multiple oxygen isotopes},
  booktitle = {},
  year = 2012,
}