Biblioteca Augustinianum
SBS Sistema Bibliotecario Sapienza
EADH European Association for Digital Humanities
AIEP - IAPS International Association of Patristic Studies
ATLA American Theological Library Association
Patrologia Latina, Graeca et Orientais
Wikipedia (Donatismo, Donatism, Donatisme, Donatismus, etc…)
Ancient World Open Bibliographies
Ancient World Open Bibliographies Wiki: Biblical Studies
UCLA Library