著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Jianhua Guo and Billy M. Williams,Real-Time Short-Term Traffic Speed Level Forecasting and Uncertainty Quantification Using Layered Kalman Filters,Transportation Research Record: Journal of the Transportation Research Board,0361-1981,SAGE Publications,2010-01,2175,1,28-37,https://cir.nii.ac.jp/crid/1360855570884410112,https://doi.org/10.3141/2175-04