@article{oai:tsukuba.repo.nii.ac.jp:00015946,
 author = {Yokota, Ichiro and Shukuzawa, Osamu},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Dec},
 pages = {451--463},
 title = {Automorphisms of order 4 of the simply connected compact Lie group E6},
 volume = {15},
 year = {1991}
}