article location http://bibfra.me/vocab/lite/link Location where the article can be accessed, such as a URL or physical location in a library. article version Literal Specifies the version of the article in context, such as preprint, postprint, or published version. doi Literal A persistent identifier or handle used to uniquely identify various objects, standardized by the International Organization for Standardization. first author http://bibfra.me/vocab/lite/Person Identifies the primary or lead author of an article, typically listed first among the authors. is retracted Literal , Literal Indicates whether an article has been officially withdrawn from publication due to issues such as errors or ethical concerns. is retracted Literal , Literal Indicates whether an article has been officially withdrawn from publication due to issues such as errors or ethical concerns. last author http://bibfra.me/vocab/lite/Person Identifies the author listed last in a multi-authored article, often signifying a senior or supervising role in the research. middle author http://bibfra.me/vocab/lite/Person Identifies an author listed between the first and last author in a multi-authored article, often contributing significantly to the research. X link http://bibfra.me/vocab/lite/link Link that directs users to a specific page or content on the social media platform X, which was previously known as Twitter. 