@article{oai:repository.dl.itc.u-tokyo.ac.jp:00017850,
 author = {Nakagiri, Shigeru},
 issue = {4},
 journal = {生産研究},
 month = {Apr},
 pages = {201--204},
 title = {研究速報 : A Note on Possible Natural Frequencies of In-plane Swing of a Sagging Chain Consisting of Rigid Links},
 volume = {52},
 year = {2000}
}