PKP and Crossref are collaborating to help publishers and journals using Open Journal Systems take better advantage of Crossref services. As of 2014, PKP has become a Sponsoring Organization of Crossref, and as such will be providing much improved Crossref integration and overall support for the service. Additionally, PKP can now act as a sponsor representative for OJS journals wishing to apply for Crossref membership, and is in some cases able to waive fees.
Additionally, this manual covers other Crossref-related services like reference linking, reference deposit, funder information, and Similarity Check.