@misc{oai:tsukuba.repo.nii.ac.jp:00011236,
 author = {Yamauchi, Hiroshi and 山内, 博},
 month = {},
 note = {2003, 【要旨】},
 title = {A theory of simple current extensions of vertex operator algebras and applications to the moonshine vertex operator algebra},
 year = {2004}
}