@article{oai:repository.dl.itc.u-tokyo.ac.jp:00033938,
 author = {Aki, Keiiti},
 issue = {3},
 journal = {東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo},
 month = {Dec},
 note = {application/pdf},
 pages = {415--456},
 title = {Space and Time Spectra of Stationary Stochastic Waves, with Special Reference to Microtremors},
 volume = {35},
 year = {1957}
}