Modern Hagiography
Lives of the Saints by Sabine Baring-Gould.
Victories of the Martyrs by Saint Alphonsus Liguori.
Hymn of Praise by Nikolaj Velimirović.
Blog devoted to Saint Febronia (see also)
Medieval Hagiography
Art & Architecture
Medieval Religion Listserv – 2016 Dillon.
The Saints in Art by Joseph Maria von Radowitz.
Emblems of Saints by Which They Are Distinguished in Works of Art by F. C. Husenbeth.
Customs & Devotions
Festa di Santa Febronia a Palagonia (and a video, photograph of fresco)