@article{oai:tsukuba.repo.nii.ac.jp:00018168,
 author = {Mizuochi, N. and 水落, 憲和 and Neumann, P. and Rempp, F. and Beck, J. and Jacques, V. and Siyushev, P. and Nakamura, K. and Twitchen, D. J. and Watanabe, H. and Yamasaki, S. and Jelezko, F. and Wrachtrup, J.},
 issue = {4},
 journal = {Physical review B},
 month = {Jul},
 title = {Coherence of single spins coupled to a nuclear spin bath of varying density},
 volume = {80},
 year = {2009}
}