Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Akivis, M. A. (Maks Aĭzikovich) and Golʹdberg, Vladislav Viktorovich",Projective differential geometry of submanifolds,,North-Holland,1993,North-Holland mathematical library,,0444897712,,https://cir.nii.ac.jp/crid/1130282270629549184