(en) Kelly Joan Whitmer, The Halle Orphanage as Scientific Community: Observation, Eclecticism, and Pietism in the Early Enlightenment, University of Chicago Press, (ISBN978-0-226-24380-1, lire en ligne)
(en) Heiner F. Klemme et Manfred Kuehn, The Bloomsbury Dictionary of Eighteenth-Century German Philosophers, Bloomsbury Publishing, (ISBN978-1-4742-5598-1, lire en ligne)