@article{CTT100608543,
  author = {Kazuhiko Yamada and Tadashi SHIMIZU and Masataka Tansho and Takahiro Nemoto and Miwako Asanuma and Mitsuru Yoshida and Toshio Yamazaki and Hiroshi Hirota},
  title = {Solid-state 17O NMR study of the electric-field-gradient and chemical shielding tensors in polycrystalline amino acids},
  journal = {Magnetic Resonance in Chemistry},
  year = 2007,
}

@article{CTT100608544,
  author = {Kazuhiko Yamada and Tadashi SHIMIZU and Mitsuru Yoshida and Miwako Asanuma and Masataka Tansho and Takahiro Nemoto and Toshio Yamazaki and Hiroshi Hirota},
  title = {Solid-state 17O NMR study of small biological compounds},
  journal = {Z. Naturforsch.},
  year = 2007,
}