@article{oai:fun.repo.nii.ac.jp:00003826,
 author = {Yamashita, Akihiro and Kawamura, Hidenori and Suzuki, Keiji},
 issue = {6},
 journal = {Journal of Advanced Computational Intelligence and Inteligent Informatics},
 month = {Nov},
 pages = {654--660},
 title = {Similarity Computation Method for Collaborative Filtering Based on Optimization},
 volume = {14},
 year = {2010}
}