We conducted a time-series analysis to clarify the sustainability for adding scholarly bibliographic references to English Wikipedia (enwiki). The results are summarized as follows: The characteristics of the trends between the edits in enwiki as a whole and the adding the references are different in the point that the latter keeps a certain scale at recent years. The number of editors adding the references has seasonal growth trends in April and November every year since 2011. The majority of new editors for adding the references contribute for single month only, but the scale of the editors remains flat in recent years. These characteristics in the editors adding the references seem to be affected by the participants of Wiki Education, so adding the references would be sustainable as long as these activities continue.
"},{"@language":"ja","@value":"Wikipedia 上の学術文献の参照記述の追加における持続可能性を明らかにするために時系列分析を行った．英語版全体での編集と参照記述の追加を比較した結果，両者は推移の特徴が異なり，参照記述の追加には伸び悩みが見られず近年においても一定の規模である．参照記述を追加する編集者は，2011 年以降は毎年4 月と11 月に多い点で周期的な特徴がある．参照記述を初めて追加した編集者(新規参加者) の過半数は，多くの年で1ヶ月のみ関与し，近年になるにつれてその傾向が強まっているが，近年でも一定の規模を維持している．周期的な特徴や新規参加者の規模の維持については，大学の授業を通じたWiki Education 参加者による影響が挙げられ，今後もこの活動が継続するとすれば，持続可能性は高いと考えられる．
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