論文中で他の研究を引用する仕方について

そのような表現は様々ですが、以下に特によく使われるものを示します。

/several/numerous/a number of/ /studies/works/ have reported…
/these/recent/ /studies/investigations/works/ have /shown/demonstrated/confirmed/revealed/…
/several/numerous/a number of/these/recent/ /studies/investigations/works/ have provided evidence /that/of/suggesting/…
/several/numerous/a number of/these/recent/ /studies/investigations/works/ have yielded results /consistent/inconsistent/ with…

や、

Smith et al. carried out a (theoretical/experimental/observational/numerical/clinical) /study on/investigation of/…
Smith et al. /studied/investigated/treated/…
Smith et al. conducted a series of experiments on…
Smith et al. conducted a survey targeting…
Smith et al. performed an experiment on…
Smith et al. obtained results /consistent with/inconsistent with/confirming/suggesting/demonstrating/elucidating/…
Smith et al. presented /results/a model/a framework/…
Smith et al. proved several theorems regarding…
Smith et al. carried out computations of … and found…
Smith et al. considered the question of…
Smith et al. considered the problem of … and found…
Smith et al. proposed a novel method for…
Smith et al. carried out discussion regarding…
Smith et al. attempted to…
Smith et al. carried out a systematic treatment of…
Smith et al. raised questions concerning…
Smith et al. pointed out problems regarding…
Smith et al. constructed a framework for…
Smith et al. elucidated…

などがあります。