Daniel Biella and Wolfram Luther: 5th European Conference on e-Learning. Academic Conferences Limited, ISBN 978-1-905305-30-8, A Synthesis Model for the Replication of Historical Experiments in Virtual Environments, S.23 (englisch, google.com).
Richard E. Snow and Marshall J. Farr (Hrsg.): Aptitude, Learning, and Instruction Volume 3: Conative and Affective Process Analysis. Routledge, 1987, ISBN 978-0-89859-721-9, Positive Affect and Organization (englisch, google.com).