@article{oai:tsukuba.repo.nii.ac.jp:00016128,
 author = {Itoh, Mitsuhiro},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {143--158},
 title = {Half conformally flat structures and the deformation obstruction space},
 volume = {17},
 year = {1993}
}