Blitsas P.,Grigoriadou Μ. and Mitsis C.(2011),Constructing a Knowledge Base according to a Text Comprehension Model, Multiple Perspectives on Problem Solving and Learning in the Digital Age, Ifenthaler, Dirk; Isaias, Pedro (Eds.), 1st Edition, Chapter 6, pp. 67-88, ISBN 978-144-197-612-3.
Blitsas P. and Grigoriadou M. (2009), Free Text Response Assessment System Based on a Text Comprehension Model, Advanced Learning, Raquel Hijon-Neira (Ed.), chapter 13, pp. 197-210 ISBN: 978-953-307-010-0, INTECH, Available from: https://www.intechopen.com/books/advanced-learning/free-text-response-assessment-system-based-on-a-text-comprehension-model.