The Faithlife Study Bible commentary on Romans 1:18 contains an expandable link to learn more about the wrath of God. The link goes to the Dictionary of Paul and His Letters (LLS:14.0.7, 2012-06-21T19:42:22Z, DPL.logos4, Hawthorne, Gerald F., Ralph P. Martin and Daniel G. Reid. Dictionary of Paul and His Letters. Downers Grove, IL: InterVarsity Press, 1993).
Except one problem: the link does not go to the article about wrath, it takes me to another article about Paul and financial support. The link seems to be wrong. Not sure where to report this. I presume it was supposed to point to the article on Wrath (as the link is labeled in the commentary).