@article{oai:tsukuba.repo.nii.ac.jp:00015968, author = {Hikari, Michitaka}, issue = {1}, journal = {Tsukuba Journal of Mathematics}, month = {Jun}, pages = {37--50}, title = {A characterization of the R-elementary groups at 2 with characters of Schur index 2 over R}, volume = {3}, year = {1979} }