Adultery Defined - Fr. John Hardon - Catholic Culture

Adultery - Catholic Encyclopedia

Impediment of Crime - Catholic Encyclopedia

The Ten Commandments - Catholic Encyclopedia

The Great Divorce: The Evil Fruits of Henry VIII's Adultery - by Christopher Check

Adultery - Catholic Catechism

Did the Church Treat the Divorced and Remarried More Leniently in Antiquity Than Today? -- Fr Gilles Pelland, SJ