Talk:Du Val singularity

External links modified
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I have just modified one external link on Du Val singularity. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
 * Added archive https://web.archive.org/web/20110707003722/http://retro.seals.ch/digbib/view?rid=ensmat-001%3A1979%3A25%3A%3A300 to http://retro.seals.ch/digbib/view?rid=ensmat-001%3A1979%3A25%3A%3A300

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Cheers.— InternetArchiveBot  (Report bug) 09:16, 14 September 2017 (UTC)