Here's one: https://pmc.ncbi.nlm.nih.gov/articles/PMC10640654/
https://radiation-research.kglmeridian.com/view/journals/rar...
Some of the authors of that work were still active when the "Flash" concept came around again, and to hear them tell the story they tried to get funding to test it in tumour-bearing mice, but both their lab heads and external funders were sure the effect would be the same in tumours as normal tissue, and so wouldn't fund the work.
They eventually moved on to other things, and it needed a few decades for someone with enough soft money to give it a go and kick off this new research field.
> The Editors-in-Chief have retracted this article. An investigation by the journal found evidence of authorship manipulation. The Editors-in-Chief therefore no longer have confidence in the provenance and reliability of the article contents. The authors disagree with the decision to retract.