1. Oxford Dictionaries (2019). Meaning of aesthetic. Available from: https://www.lexico.com/en/definition/aesthetic.
2. Britannica (2019). Meaning of aesthetic. Available from: https://www.britannica.com/topic/aesthetics
3. S. Fu, “User interface design by applying theories of aesthetics”, B.Sc. thesis, Lahti University of Applied Sciences, (2012), Available from: https://www.theseus.fi/bitstream/handle/10024/44065/Siqi_Fu.pdf?sequence=4.
4. L. Lund, “Aesthetics in user interface design: The influence on users’ preference, decoding and learning”, B.Sc. thesis, Blekinge Institute of Technology (2015), Available from: http://www.diva-portal.org/smash/record.jsf?pid=diva2%3A842669&dswid=7988, urn: nbn:se:bth-10455.