@article{oai:repository.dl.itc.u-tokyo.ac.jp:00032667,
 author = {Kawakatsu, Hitoshi},
 issue = {3-4},
 journal = {東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo},
 month = {Mar},
 note = {application/pdf},
 pages = {267--274},
 title = {On the Realtime Monitoring of the Long-period Seismic Wavefield},
 volume = {73},
 year = {1999}
}