1. Stoyanov, S., et al.: Intelligent distributed eLearning architecture. In: Koleshko, V.M. (ed.) Intelligent Systems, InTech, pp. 185–218, March 2012. 978-953-51-0054-6, Hard cover, 366 pages
2. Wang, F.-Y.: The emergence of intelligent enterprises: from CPS to CPSS. IEEE Intell. Syst. 25(4), 85–88 (2010)
3. Valkanov, V., Stoyanov, S., Valkanova, V.: Building a virtual education space. In: The 19th World Multi-Conference on Systematics, Cybernetics and Informatics, Orlando, Florida, USA, 12–15 July 2015, pp. 322–326 (2015)
4. Kevin, A.: That “Internet of Things”, in the real world things matter than ideas. RFID J. 22, 97–114 (2009)
5. Domingo, M.G., Forner, J.M.: Expanding the learning environment: combining physicality and virtuality. The Internet of Things for eLearning. In: 10th IEEE International Conference on Advanced Learning Technologies, Tunisia, pp. 730–731 (2010)