User talk:2001:EE0:4141:E741:F803:256D:EFCA:8AC6

Hi unregistered user,

I'm not sure what you're trying to accomplish on the article Vincent Lafforgue, but you've twice now replaced a reference with a URL of a Wikipedia page. Wikipedia is never suitable for use as a reference on Wikipedia (see our policy on that here: WP:UGC), which is why I've reverted your edit. You could try using edit summaries (explained here) or the talk page attached to the article (located here) to explain what you're doing, and maybe more experienced Wikipedia editors could help. You could also request help at WikiProject Mathematics (follow this link).

All the best, JBL (talk) 11:33, 30 September 2019 (UTC)