I am not familiar to your field but I think I can help with a suggestion.
You can try to come up with some key words from the topic area and google, that should be able to give you more beyond theses. It might not be exactly directly from the area of your interest but it will give you dots to start connecting
otherwise, you may also choose to use referencing software, eg, endnote, mendeley, that can help you to narrow down your search to relevant reference materials using key words