@article{oai:teapot.lib.ocha.ac.jp:00034763,
 author = {Asamoto, Noriko and Koyama, Toshiko},
 issue = {1},
 journal = {お茶の水女子大學自然科學報告},
 month = {Jul},
 note = {application/pdf, 紀要論文},
 pages = {47--48},
 title = {On Some Torsion-free Classes},
 volume = {37},
 year = {1986}
}