@article{weko_567_1,
   author	 = "久保,徳次郎",
   title	 = "オプション取引についての一考察",
   journal	 = "論叢",
   year 	 = "1990",
   volume	 = "",
   number	 = "35",
   pages	 = "57--67",
   month	 = "jul"
}