TurboSBIR has built out a tool that searches all across the internet for relevant articles that can support your grant proposal. You can find this tool beside the text box of each grant writing section.
To use Vestra, copy and paste 2-3 sentences from any section of your proposal and click “Search”. Vestra will then show similarly matched articles and provide you full text PDFs of these to use. You can then use these articles as references that can be cited and used as aids to complete your grant proposal.