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Chen, P., Kuo, R., Chang, M., & Heh, J.-S. (2009). Designing a Trading Card Game as Educational Reward System to Improve Students' Learning Motivations. Transactions on Edutainment, III,, , 116–128.
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Bagheri, E., & Ghorbani, A.A. (2010). UML-CI: A Reference Model for Profiling Critical Infrastructure Systems. information Systems Frontiers, 12(2), 115–139.
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Kinshuk, & Graf, S. (2012). Ubiquitous Learning. (pp. 3361–3363). Encyclopedia of the Sciences of Learning. Springer US.
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Ross, T., Chang, T. - W., Ives, C., Parker, N., Han, A., & Graf, S. (2016). The Academic Analytics Tool: Workflow and Use Cases. Innovations in Smart Learning. Springer Singapore.
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Graf, S., Lachance, P., & Mishra, B. (2015). Integrating Motivational Techniques into Learning Management Systems. State-of-the-Art and Future Directions of Smart Learning. Springer Singapore.
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