wiki hyperlink: https://en.m.wikipedia.org/wiki/Yvette_Cauchois
404 hyperlink: http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=PHTOAD000054000004000088000001&idtype=cvips&prog=normal in "reference 7"
IABot Management Interface (v2.0.1; checkIfDead v1.8)
There are many reasons why the bot does not detect/edit URLs as dead. For example, it checks several times over the span of a couple of weeks before declaring a particular URL as dead.
It seems that the URL has been replaced in the article. I nevertheless marked it as dead in the database.