@misc{oai:tsukuba.repo.nii.ac.jp:00047518,
 author = {Yu, Dongxiao and 于, 冬暁},
 month = {},
 note = {2017, 【要旨】},
 title = {Crystals for an extremal weight module over the quantized hyperbolic Kac-Moody algebra of rank 2},
 year = {2018}
}