Miniature Lives Of The Saints For Every Day In The Year by Henry Sebastian Bowden.
Barbara Newman, Thomas of Cantimpré: The Collected Saints’ Lives: Abbot John of Cantimpré, Christina the Astonishing, Margaret of Ypres, and Lutgard of Aywières (2008) (not in the public domain).
The Writings of Saint Lutgardis
Art & Architecture
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.