1. Weiser, M.: The computer for the 21st century. Sci. Am. 265, 94–104 (2011)
2. Yufei, Y., Wuping, Z.: Mobile task characteristics and the needs for mobile work support: a comparison between mobile knowledge workers and field workers. In: Eighth International Conference on Mobile Business, pp. 7–11 (2009)
3. Yousfi, A., de Freitas, A., Dey, A., Saidi, R.: The use of ubiquitous computing for business process improvement. In: IEEE Transactions on Services Computing, vol. PP(99), pp. 1–1 (2015)
4. Abowd, G.D., Dey, A.K., Brown, P.J., Davies, N., Smith, M., Steggles, P.: Towards a better understanding of context and context-awareness. Lect. Notes Comput. Sci. 1707, 304–307 (1999)
5. Mell, P., Grance, T.: The NIST definition of cloud computing. In: Computer Security Division, Information Technology Laboratory, NIST (2011)