Developing Distant Learning Services over Broadband Networks: Concepts and Alternatives. - Theodore K. Apostolopoulos; Anna S. Kefala (IMSA, 1999)

An E-Learning Service Management Architecture. - Theodore K. Apostolopoulos; Anna S. Kefala (ICALT, 2003)

An XML-Based E-learning Service Management Framework. - Theodore K. Apostolopoulos; Anna S. Kefala (ICALT, 2004)

A UML Definition of a Management Framework for e-Learning Session-centric Services. - Theodore K. Apostolopoulos; Anna S. Kefala (WEBIST (3), 2007)

Quality of learner experience in technology-enhanced learning: a reference layered framework, model instantiation guidelines and empirical Investigation - Anna S. Kefala (2019)

Continuous authorization over HTTP using Verifiable Credentials and OAuth 2.0. - Nikos Fotiou; Evgenia Faltaka; Vasilis Kalos; Anna S. Kefala; Iakovos Pittaras; Vasilios A. Siris; George C. Polyzos (Open Identity Summit, 2022)