It looks like the user added an invalid source to this article, can someone revert the addition? Thank you. ARsygo (talk) 03:01, 16 October 2021 (UTC)
- Done. Please inform the user of the fact that unconstructive edits such as adding irrelevant topics violate the policy. Thank you.
- p-adic 04:34, 16 October 2021 (UTC)