@article{oai:nagoya.repo.nii.ac.jp:00031201,
 author = {Yamamoto, Toshio and Ōta, Hiroshi},
 issue = {1},
 journal = {Memoirs of the Faculty of Engineering, Nagoya University},
 month = {Sep},
 pages = {1--78},
 title = {On the vibrations of a shaft carrying an unsymmetrical rotor},
 volume = {21},
 year = {1969}
}