When a paper has been retracted, we should probably stop citing it approvingly. Just a thought.
Using data from over 3,000 retracted articles and over 74,000 citations to these articles, we find that at least 31.2% of the citations to retracted articles happen a year after they have been retracted. And that 91.4% of the post-retraction citations are approving—note no concern with the cited article.Ken Cor & Gaurav Sood
Read Propagation of Error: Approving Citations to Problematic Research by Ken Cor and Gaurav Sod. Their data and scripts are available here.