Kayvan Kousha, Characteristics of open access scholarly publishing: A multidisciplinary study

From the Abstract: "More knowledge about open access (OA) scholarly publishing on the web would be helpful for citation data mining and the development of web-based citation indexes. Hence, the main purpose of this study is to identify common characteristics of open access publishing, which may therefore enable us to measure different aspects of e-research on the web....The OA web citation network was dominated by PDF format files and non-hyperlinked citations...."