-Hetta Howes, A Brief History of Medieval Magic, historyextra.com/period/medieva…
-David Porreca, Using Gems in Medieval Spells, medievalists.net/2014/05/using-….
-Laura Mitchell, Love and the Longevity of Charms, recipes.hypotheses.org/10806
-Elizabeth Meg, Medieval Magic, Folklore and Superstition, scranshums.com/2016/05/27/med….