1. NASA National Aeronautics and Space Administration. 2017. NASA TLX (Task Load Index. https://humansystems.arc.nasa.gov/groups/tlx/ 2017-10-10. NASA National Aeronautics and Space Administration. 2017. NASA TLX (Task Load Index. https://humansystems.arc.nasa.gov/groups/tlx/ 2017-10-10.
2. Amazon.com. 2017. Amazon Go. https://www.amazon.com/b?node=16008589011 2017-03-31. Amazon.com. 2017. Amazon Go. https://www.amazon.com/b?node=16008589011 2017-03-31.
3. Darren Black and Nils Jakob Clemmensen. 2006. When More is Less: Designing for Attention in Mobile Context-Aware Computing. https://projekter.aau.dk/projekter/files/61067950/1149771247.pdf 2019-08-11. Darren Black and Nils Jakob Clemmensen. 2006. When More is Less: Designing for Attention in Mobile Context-Aware Computing. https://projekter.aau.dk/projekter/files/61067950/1149771247.pdf 2019-08-11.
4. Supporting the supermarket shopping experience through a context-aware shopping trolley