1. Pew Research Center: Social Trends (2016). http://www.pewsocialtrends.org/2016/10/06/the-state-of-american-jobs/
2. Brynjolfsson, E., McAfee, A.: Race Against the Machine: How the Digital Revolution is Accelerating Innovation, Driving Productivity, and Irreversibly Transforming Employment and the Economy. Digital Frontier Press, Lexington (2011)
3. Woolf, B.P.: Building Intelligent Interactive Tutors: Student-centered Strategies for Revolutionizing e-Learning. Morgan Kaufman, Burlington (2008)
4. National Academy of Engineering: Grand Challenges for Engineering. National Academy of Sciences/National Academy of Engineering, Washington, DC (2008)
5. Craig, S.D., Graesser, A.C., Sullins, J., Gholson, B.: Affect and learning: an exploratory look into the role of affect in learning with AutoTutor. J. Educ. Media 29(3), 241–250 (2004)