@article{oai:tsukuba.repo.nii.ac.jp:00017121,
 author = {Kamada, Hiroyuki},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Oct},
 pages = {321--332},
 title = {Neutral hyperkahler structures on primary Kodaira surfaces},
 volume = {23},
 year = {1999}
}