DOI Links on Wikipedia - Analyses of English, Japanese, and Chinese Wikipedias. - Jiro Kikkawa; Masao Takaku; Fuyuki Yoshikane (ICADL, 2016)

A Study of Scholarly Bibliographic References on Wikipedia. - Jiro Kikkawa (2021)

Analysis of the Deletions of DOIs - What Factors Undermine Their Persistence and to What Extent? - Jiro Kikkawa; Masao Takaku; Fuyuki Yoshikane (TPDL, 2022)

Quantitative Analysis of Scholarly References on YouTube - Focusing on Their Research Fields and Contributors. - Jiro Kikkawa; Masao Takaku; Fuyuki Yoshikane (ICADL (1), 2023)

Time Lag Analysis of Adding Scholarly References to English Wikipedia - How Rapidly Are They Added to and How Fresh Are They? - Jiro Kikkawa; Masao Takaku; Fuyuki Yoshikane (iConference (2), 2023)

Enhancing Identification of Scholarly Reference on YouTube - Method Development and Analysis of External Link Characteristics. - Jiro Kikkawa; Masao Takaku; Fuyuki Yoshikane (TPDL (1), 2024)