@article{oai:tsukuba.repo.nii.ac.jp:00007813,
 author = {Manke, T. and Khan, A. Ali and Aoki, S. and Burkhalter, R. and Ejiri, S. and Fukugita, M. and Hashimoto, S. and Ishizuka, N. and Iwasaki, Y. and 岩崎, 洋一 and Kanaya, K. and Kaneko, T. and Kuramashi, Y. and Nagai, K. and Okawa, M. and Shanahan, H. P. and Ukawa, A. and 宇川, 彰 and Yoshie, T.},
 issue = {11},
 journal = {Physical review D},
 month = {Nov},
 note = {We study the effects of two dynamical sea quarks on the spectrum of heavy quarkonia. Within the non-relativistic approach to lattice QCD we find sizable changes to the hyperfine splitting, but we do not observe any changes for the fine structure. We also investigate the scaling behavior of our results for several different lattice spacings.},
 title = {Sea quark effects on quarkonia},
 volume = {62},
 year = {2000}
}