@article{oai:fun.repo.nii.ac.jp:00003428,
 author = {Kawaguchi, Satoshi},
 issue = {10},
 journal = {Journal of the physical societty of Japan},
 month = {},
 title = {Perturbative approach to Coulomb interaction in double quantum dot systems},
 volume = {76},
 year = {2007}
}