User talk:Tirthankar de

April 2020
Hello, I'm ComplexRational. I noticed that you added or changed content in an article, Cerium, but you didn't provide a reliable source. It's been removed and archived in the page history for now, but if you'd like to include a citation and re-add it, please do so. You can have a look at the tutorial on citing sources. If you think I made a mistake, you can leave me a message on my talk page. Thank you. ComplexRational (talk) 13:16, 23 April 2020 (UTC)

Page 12 of the book lanthanides and actinides by Simon cotton is the source. Read the book in libgen.is and please add my sentence cause I don't know how to add it Tirthankar de (talk) 04:34, 24 April 2020 (UTC)