This third-party plugin allows journals to display citations and citation counts (using article DOIs) from Scopus and/or Crossref. The option to display citation for Google Scholar and Europe Pubmed is also supported.
If the plugin is compatible with your version of OJS, you can install this plugin via the plugin gallery.
NOTE: You must contact Crossref to ask for the Cited-by service to be enabled for your prefix(es), if you want to use Crossref within this Plugin.
Once enabled and configured, the plugin will display the count and list of the citation on the sidebar of the article landing page.