Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Flaschel, P. and Klingenberg, Wilhelm",Riemannsche Hilbert-mannigfaltigkeiten : periodische Geodätische,,Springer-Verlag,1972,Lecture notes in mathematics,,"3540059687,0387059687",,https://cir.nii.ac.jp/crid/1130000797541336960