著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL
"Helffer, Bernard and Nier, Francis",Hypoelliptic estimates and spectral theory for Fokker-Planck operators and Witten Laplacians,,Springer,2005,Lecture notes in mathematics,,3540242007,,https://cir.nii.ac.jp/crid/1130000796581525120