 beautiful thing about Zotero is retracted items. That is, if you click on this retracted items, whatever articles in my reference list has been retracted will get updated into the Zotero and these references, we will avoid them in citing in our own manuscript. If you go here and click this work will be retracted for the following reasons. So, this retraction update will be given by the journal. So, based on that Zotero will give alert to remove this reference so that we can avoid citing or referring those article in our own manuscript.