Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Fukushima Masatoshi,On Random Spectra,Butsuri,00290181,The Physical Society of Japan,1979,34,2,153-159,https://cir.nii.ac.jp/crid/1390001205407630208,https://doi.org/10.11316/butsuri1946.34.153