@article{oai:tsukuba.repo.nii.ac.jp:00015798,
 author = {Koyama, Akira},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Dec},
 pages = {319--332},
 title = {Various compact multi-retracts and shape theory},
 volume = {6},
 year = {1982}
}