@article{oai:tsukuba.repo.nii.ac.jp:00017269,
 author = {Andruskiewitsch, Nicolas and Natale, Sonia},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {187--201},
 title = {Counting arguments for Hopf algebras of low dimension},
 volume = {25},
 year = {2001}
}