Tremere2
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Reliable sources edit
Welcome to Wikipedia. Everyone is welcome to contribute to the encyclopedia, but when you add or change content, as you did to the article Mass–energy equivalence, please cite a reliable source for your addition. This helps maintain our policy of verifiability. See Wikipedia:Citing sources for how to cite sources, and the welcome page to learn more about contributing to this encyclopedia. Thank you. - DVdm (talk) 09:06, 6 October 2011 (UTC)
October 2011 edit
Please do not add or significantly change content without citing verifiable and reliable sources, as you did with this edit to Special relativity. Before making any potentially controversial edits, it is recommended that you discuss them first on the article's talk page. Please review the guidelines at Wikipedia:Citing sources and take this opportunity to add references to the article. DVdm (talk) 09:32, 6 October 2011 (UTC)
Wikipedia articles must always be written from a detached, objective point of view. Articles must not be used to promote personal opinions, and such language as "we must always have in mind ... " never belongs in articles. JamesBWatson (talk) 11:27, 6 October 2011 (UTC)