Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Chakrabarti, Sandip K.","Observational evidence for black holes in the universe : proceedings of a conference held in Calcutta, India, January 10-17, 1998",,Kluwer Academic Publishers,1999,Astrophysics and space science library,,079235298X,,https://cir.nii.ac.jp/crid/1130282272342866560