User talk:HoangNguyen7

August 2020
Hello, I'm DVdm. I wanted to let you know that I removed one or more external links you added to Variable speed of light because they seemed inappropriate for an encyclopedia. If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page or take a look at our guidelines about links. Thank you. DVdm (talk) 21:10, 23 August 2020 (UTC)

Note: please see wp:ELNO, item #11: Blogs, personal web pages and most fansites (negative ones included), except those written by a recognized authority.''" - DVdm (talk) 21:17, 23 August 2020 (UTC)