I don't think these articles will be saved elsewhere online, so I downloaded some of them to my computer. They are in PDF format. There are also shorter articles, accompanied by photos of choice coins, in their "Historical Articles" section. These cannot be downloaded as far as I can tell, but the text and photo can be copied and pasted into a Word document. I've done that for two articles related to Athens. https://www.romanumismatics.com/historicarticles?task=historicarticles
I checked and at least some of them are archived at the Internet Archive. I checked the first one and the last one. https://web.archive.org/web/2024052...cs.com/historicarticles?task=historicarticles
Here's another site with screen shots of all the Roma Numismatics articles, including e-journal articles: https://roma-archive-unofficial.weebly.com/