(en) Daniel Biella et Wolfram Luther, 5th European Conference on e-Learning, Academic Conferences Limited (ISBN978-1-905305-30-8, lire en ligne), « A Synthesis Model for the Replication of Historical Experiments in Virtual Environments », p. 23
(en) Aptitude, Learning, and Instruction Volume 3: Conative and Affective Process Analysis, Routledge, (ISBN978-0-89859-721-9, lire en ligne), « Positive Affect and Organization »