Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 椹木 義一 and 砂原 善文 and 添田 喬,Time-Dependent Probability Distribution of the Non-Stationary Response of Nonlinear Control Systems,Journal of the Society of Mechanical Engineers,00290270,The Japan Society of Mechanical Engineers,1962,65,522,1043,https://cir.nii.ac.jp/crid/1390001205917152256,https://doi.org/10.1299/jsmemag.65.522_1043_2