@techreport{oai:repository.dl.itc.u-tokyo.ac.jp:00042239,
 author = {Matsushita, Yukitoshi},
 month = {Feb},
 note = {application/pdf, 本文フィルはリンク先を参照のこと},
 title = {Approximate Distributions of the Likelihood Ratio Statistic in a Structural Equation with Many Instruments},
 year = {2007}
}