@article{oai:tsukuba.repo.nii.ac.jp:00018590,
 author = {Sakamoto, Reiko},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Dec},
 pages = {437--453},
 title = {Restricted energy inequalities and numerical approximations},
 volume = {28},
 year = {2004}
}