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) FENG K.,The symplectic methods for the computation of Hamiltonian equations,Lec. Notes Math.,,,1987,1297,,1-37,https://cir.nii.ac.jp/crid/1572824499600804352,