@article{oai:hokusei.repo.nii.ac.jp:00001261,
 author = {皆木, 健男 and Minaki, Takeo},
 month = {2014-02-20},
 title = {Macroeconomic Indicator Announcements, Liquidity, Volatility and Effective Half Spread in JGB Futures},
 year = {}
}