These are just some of the examples:
Introduction to the Letter to the Romans From the New American Bible
Romans From the NIV Bible: author, date and place of writing, recipients, major theme, purpose, occasion, content, special characteristics, and outline
“Justification by Faith” in Galatians & Romans By Felix Just, S.J., Ph.D.
Paul’s Use of the Old Testament in Romans By Daniel J. Harrington in Studies in Christian-Jewish Relations, 2009
The Protestant Reformers’ Readings of Romans 9-11, with Modern Critical Response By Galen Johnson in Quodlibet Online Journal of Christian Theology and Philosophy, March 2004
But you can find more here: