I post this link not so much for the article itself, which I have not read, but due to the website at which it appears, which is not something I have seen before. This was posted in the EP Facebook group and may or may not be useful if you are looking for other research papers. Caveat emptor.
ALSO ANOTHER WARNING: As the thread has proceeded most of the comments about this article are negative. We do keep adverse articles up sometimes as a means of knowing what to react against, so I won't remove this at least at this point, but do be sure not to take it as unquestioned Epicurean material. Many academic articles are hostile to Epicurus and this one may be too.