User talk:Zakspeed2

Hello, I'm Materialscientist. I noticed that you made a change to an article, but you didn't provide a reliable source. It's been removed for now, but if you'd like to include a citation and re-add it, please do so! If you need guidance on referencing, please see the referencing for beginners tutorial, or if you think I made a mistake, you can leave me a message on my talk page. Thank you. Materialscientist (talk) 19:57, 19 November 2013 (UTC) Hello, sorry for my english but it's true what i changed but i changed with my celphone and i'm not so an good writer, I'm really sorry