@article{oai:tsukuba.repo.nii.ac.jp:00017565,
 author = {Jianwei, Zhou},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {77--97},
 title = {Spinors,Calibrations and Grassmannians},
 volume = {27},
 year = {2003}
}