User talk:2409:4070:229D:D0B1:0:0:E86:30A1

March 2019
Hello, I'm Newslinger. I noticed that you made a change to an article, Reciprocity theorem, but you didn't provide a source. I’ve removed it for now, but if you’d like to include a citation to a reliable source and re-add it, please do so! If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thanks. —  Newslinger  talk   13:22, 19 March 2019 (UTC)
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