To search by publisher, start typing the publisher name into the publisher search box.
Example: British Hydrological Society or CERN
Note that these are not always obvious e.g. FIGSHARE DOIs are listed as "CDL.DIGSCI - Digital Science". Some publishers have multiple prefixes and some publishers share DOI prefixes.
To search by identifier, enter a complete DOI (e.g. "10.9998/abc123") or DOI prefix (e.g."10.9998/") in the search box. You can change the identifier type to search and how to match it using the drop-downs.
>Example: Choose "Other ID" as the identifier type and enter "uk.bl" in the search box to see all Ethos e-theses