Archangels: who are they and what is their function?
Who and What Are the Demons and the Angels in the Bible?
Angel - Wikipedia
Who Was the Archangel Gabriel? - NIV Bible
The Surprising Role of Guardian Angels
Michael, Gods and Demons Wiki
The First Angel: The Untold Story of the First Angel of God by Thomas R. Brown
What Does the Bible Say About Angels? Understanding Heaven's Mighty Warriors - David Jeremiah Blog
The 9 choirs of angels and the roles given them by God
What is the first mention of angels in the Bible? - Quora
What angels are named in the Bible? - Quora