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
"Keum, Jeong Yeon",Exercise price bias test and firm size effect in the Black and Scholes model,,Korea Development Institute,1989,KDI working paper,,,,https://cir.nii.ac.jp/crid/1130282271779359360