Hendricks, Ginny; Lammey, Rachael (September 12, 2023). "Crossref acquires Retraction Watch data and opens it for the scientific community". doi:10.13003/c23rw1d9. {{cite web}}: Missing or empty |url= (help)
Lammey, Rachael; Oransky, Ivan (January 7, 2024). "Retraction Watch and Crossref: Collaborating to Improve the Assessment of Scholarly Outputs". Science Editor. doi:10.36591/SE-D-4701-01. {{cite web}}: Missing or empty |url= (help)