@misc{oai:chuo-u.repo.nii.ac.jp:00001084,
 author = {SUWA, Noriyuki},
 month = {Jul},
 note = {application/pdf, We formulate the notion of cleft extensions in the Hopf-Galois theory in the frame-work of algebraic geometry. The unit group scheme of the algebra of a finite at group scheme plays the key role.},
 title = {GROUP ALGEBRAS AND NORMAL BASIS PROBLEM},
 year = {2013}
}