@article{CTT100608532,
  author = {Kazuhiko Yamada and Toshio Yamazaki and Miwako Asanuma and Hiroshi Hirota and Naoki Yamamoto and Yasuhiro Kajihara},
  title = {Solid-state 17O NMR in biological solids: efficient 17O labeling of amino acids and peptides},
  journal = {Chemistry Letters},
  year = 2007,
}