No, ProQuest supports article level linking with any of the following commercial link resolver vendors:
- SFX by Exlibris
- LinkFinder by Endeavor Information Systems
- WebBridge by Innovative Interfaces Inc.
- Article Linker by Serials Solutions
- SIRSI Linker by SIRSI
- 1Cate by Openly Informatics, Inc
- LinkSolver by Ovid
Additionally, ProQuest CrossLinks supports a flexible link definition that can be used with most any electronic resource that is accessible via a URL.