@article{oai:u-ryukyu.repo.nii.ac.jp:02006948,
 author = {Maehara, Hiroshi and 前原, 濶},
 issue = {16},
 journal = {琉球大学理工学部紀要. 理学編, Bulletin of Science & Engineering Division, University of Ryukyus. Mathematics & natural sciences},
 month = {Mar},
 note = {紀要論文},
 pages = {19--25},
 title = {The Second Homology Group of the Quotient Space of a Periodic Transformation},
 year = {1973}
}