@article{oai:tsukuba.repo.nii.ac.jp:00016239,
 author = {Tkahashi, Moto-o},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Dec},
 pages = {347--349},
 title = {Non-triviality of certain finitely-presented groups},
 volume = {19},
 year = {1995}
}