and analyze scholarly bibliographic references on Wikipedia – based on the following two papers www.nature.com/scientificdata Dataset of first appearances of the scholarly bibliographic references on Wikipedia articles Jiro Kikkawa ✉ , Masao Takaku & Fuyuki Yoshikane Referencing scholarly documents as information sources on Wikipedia is important because it supports or improves the quality of Wikipedia content. Several studies have been conducted regarding scholarly references on Wikipedia; however, little is known of the editors and their edits contributing to add the scholarly references on Wikipedia. In this study, we develop a methodology to detect the oldest scholarly reference added to Wikipedia articles by which a certain paper is uniquely identifiable as the “first appearance of the scholarly reference.” We identified the first appearances of 923,894 scholarly references (611,119 unique DOIs) in 180,795 unique pages on English Wikipedia as of March 1, 2017 and stored them in the dataset. Moreover, we assessed the precision of the dataset, which was highly precise regardless of the research field. Finally, we demonstrate the potential of our dataset. This dataset is unique and attracts those who are interested in how the scholarly references on Wikipedia grew and which editors added them. Background & Summary Along with the digitization of scholarly communication, numerous scholarly documents have been referenced and used on the Web. One of the changes arising from the development and dissemination of scholarly infor- mation infrastructures on the Web is the utilization of scholarly documents by various people and communities, including readers other than traditional ones such as researchers and specialists. As such an example, there are many references and accesses to scholarly documents via Wikipedia. In particular, according to Crossref, which assigns Digital Object Identi ers (DOIs) to scholarly documents massively, Wikipedia is one of the largest refer- rers of Crossref DOIs as of 20151. Wikipedia is a free online encyclopedia that anyone can edit, and it has been one of the most visited websites in the world. However, owing to its collaborative nature, much criticism and discussion have emerged since its start with regard to the accuracy and reliability of its contents. ree core content policies exist in Wikipedia: “veri ability,” “neutral point of view,” and “no original research.” Referencing scholarly documents as informa- tion sources on Wikipedia complements these policies, as these cited sources support or improve the quality of Wikipedia content. Several studies have been conducted regarding scholarly bibliographic references on Wikipedia; however, most of them have focused on the scholarly document itself2–6. e methodologies in previous studies used DaTa DEScRIpTOR OpEN Kikkawa, Jiro; Takaku, Masao; Yoshikane, Fuyuki: "Dataset of first appearances of the scholarly bibliographic references on Wikipedia articles", Scientific Data, Vol. 9, Article No. 85, pp. 1-11, 2022. https://doi.org/10.1038/s41597-022-01190-z Time Lag Analysis of Adding Scholarly References to English Wikipedia How Rapidly Are They Added to and How Fresh Are They? Jiro Kikkawa( B) , Masao Takaku , and Fuyuki Yoshikane University of Tsukuba, Tsukuba, Ibaraki, Japan {jiro,masao,fuyuki}@slis.tsukuba.ac.jp Abstract. Referencing scholarly documents as information sources on Wikipedia is important because they complement and improve the qual- ity of Wikipedia content. However, little is known about them, such as how rapidly they are added and how fresh they are. To answer these ques- tions, we conduct a time-series analysis of adding scholarly references to the English Wikipedia as of October 2021. Consequently, we detect no tendencies in Wikipedia articles created recently to refer to more fresh references because the time lag between publishing the scholarly articles and adding references of the corresponding paper to Wikipedia articles has remained generally constant over the years. In contrast, tendencies to decrease over time in the time lag between creating Wikipedia articles and adding the first scholarly references are observed. The percentage of cases where scholarly references were added simultaneously as Wikipedia articles are created is found to have increased over the years, particu- larly since 2007–2008. This trend can be seen as a response to the policy changes of the Wikipedia community at that time that was adopted by various editors, rather than depending on massive activities by a small number of editors. Kikkawa, Jiro; Takaku, Masao; Yoshikane, Fuyuki: "Time Lag Analysis of Adding Scholarly References to English Wikipedia: How Rapidly Are They Added to and How Fresh Are They?", Proceedings of the 18th International Conference, iConference 2023, Lecture Notes in Computer Science (LNCS), Vol. 13972, pp. 425-438, 2023. https://doi.org/10.1007/978-3-031-28032-0_33