The Ancients and the Scholastics
- Survey article from the History of Economic Thought website.
- http://cepa.newschool.edu/het/schools/ancients.htm

Thomas Aquinas: On Usury
- From the Medieval Sourcebook.
- http://www.fordham.edu/halsall/source/aquinas-usury.html

Churches Come to Terms with Moneylending
- An article on how Christian churches came to accept the concept of interest.
- http://gvanv.com/compass/arch/v1405/fahey.html

The Church Fathers On Usury, 400-444
- From the Medieval Sourcebook.
- http://www.fordham.edu/halsall/source/444leousury.html

Catholicism and Capitalism
- Article by the libertarian Murray Rothbard looking at the two encyclicals, Quadrigisimo Anno and Rerum Novarum.
- http://www.lewrockwell.com/rothbard/rothbard59.html