This document discusses CrossMark and FundRef, tools developed by CrossRef. CrossMark allows publishers to identify and link to the most updated version of scholarly works. It was launched in 2012 and has over 270,000 deposits and 2,700 updates. The document outlines the steps to implement CrossMark, which include creating a CrossMark policy page, depositing CrossMark metadata, adding CrossMark metadata to PDFs and HTML pages, and displaying the CrossMark logo. FundRef allows linking funding information to published research.