American Academy of Research Historians of Medieval Spain
Library
<http://www.uca.edu/divisions/academic/history/aarhms/default.html>.

Digithèque de l'ULB : Digithèque Henri Pirenne
<http://bib7.ulb.ac.be/uhtbin/cgisirsi/nc9cKy837M/S.HUMAINES/126330031/60/30513/X>

Reti Medievali. Iniziative per la storia medievale
RM Scaffale
<http://fermi.univr.it/RM/biblioteca/Bib-Scaffale.htm>

University of Evansville, Exploring Ancient World Cultures: An introduction to ancient world cultures on the world-wide-web
Essay index: medieval Europe
<http://eawc.evansville.edu/essays/mepage.htm>.

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