A source of information about bibliographic citations, such as Google Scholar, Web of Science or Scopus. The number of times a work has been cited globally, as determined from a particular bibliographic information source on a particular date. A property linking a publication entity to the property c40:GlobalCitationCount that specify how many times a work has been cited by others, according to a particular information source on a particular date. A property linking the property c40:GlobalCitationCount to the bibliographic information source providing the global citation count information for a particular publication on a particular date. An integer defining the value of the global citation count of a cited entity recorded from a named bibliographic information source on a particular date. The date on which the global citation count of the cited entity was recorded from a named bibliographic information source.