1. Røkke, K.F.: Crane Maintenance in the Era of Industry 4.0. Master Thesis, NTNU (2017)
2. Haller, S., Karnouskos, S., Schroth, C.: The Internet of Things in an Enterprise Context, SAP Research (2008)
3. James, R.: The Internet of Things—A Study in Hype, Reality, Disruption, and Growth (2014).
http://sitic.org/wp-content/uploads/The-Internet-of-Things-A-Study-in-Hype-Reality-Disruption-and-Growth.pdf
4. Atzori, L., Iera, A., Motabito, G.: The internet of things: A survey. Comput. Netw. 54(15), 2787–2805 (2010)
5. Evans, D.: The internet of things how the next evolution of the internet is changing everything. White paper,
http://www.cisco.com/c/dam/en_us/about/ac79/docs/innov/IoT_IBSG_0411FINAL.pdf
. Accessed: 2019