This study employs bibliometric analysis to examine scientific literature on Open Educational Resources (OER) in higher education, utilizing data collected from the Scopus database from 2004 to 2023. The analysis, conducted using VOSviewer and RStudio integrated with Biblioshiny, identifies a total of 866 scientific publications, comprising 575 journal articles, 158 conference papers, 8 books, and 125 book chapters. Among these, 378 publications (43.65%) are open access. The findings reveal a significant surge in OER-related publications in 2020, with 124 publications (14.3%), including 63 open access publications, marking a turning point for further growth in subsequent years. The United States leads in publication volume, collaboration networks, and citation impact. The most prominent journal in this field is International Review of Research in Open and Distributed Learning, an open access journal. The most cited and influential article is the 2009 open access publication by Hilton J. In addition, the study identifies thematic developments over the years, particularly the emergence of new keywords in the wake of the COVID-19 pandemic, such as “COVID-19,” “open education practice,” and “educational innovation.” This study contributes to updating existing knowledge on OER and provides preliminary insights into the impact of COVID-19 on the field.

Keywords

bibliometric analysis · COVID-19 · higher education · OER · open education resources