[1] Al-Showarah, Suleyman (2015). Effects of age on smartphone and tablet usability, based on eye-movement tracking and touch-gesture interactions. Ph.D. thesis, School of Computing, University of Buckingham. 1–186.
[2] Caprani, N., O’Connor, N., & Gurrin, C. (2012). Touch screens for the older user. Assistive Technologies, (1), 95/118. https://doi.org/10.5772/1089
[3] Chen, K. B., Savage, A. B., Chourasia, A. O., Wiegmann, D. A., & Sesto, M. E. (2013). Touch screen performance by individuals with and without motor control disabilities. Applied Ergonomics, 44(2), 297–302. https://doi.org/10.1016/j.apergo.2012.08.004
[4] Holzinger, A., Searle, G., & Nischelwitzer, A. (2007). On Some Aspects of Improving Mobile Applications for the Elderly. In: Stephanidis, C. (eds) Universal Acess in Human Computer Interaction. Coping with Diversity. UAHCI 2007. Lecture Notes in Computer Science, vol 4554. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73279-2_103
[5] Hwang, W. & Salvendy, G. Number of people required for usability evaluation: The 10±2 rule. Commun. ACM 53, 5 (May 2010), 130-133.
[6] Kapczyński, A., & Lawnik, M. (2020). Initial survey on interaction of elderly people with smartphones. Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska, 149, 303–313.
[7] Kause, M. (2013). I just wanted a beautiful phone: Checklist-based evaluation of smartphones usability for the elderly users. M.Sc. Thesis, School of Information Sciences and Interactive Technology, University of Tampere. 1-47.
[8] Nielsen, J. Why You Only Need to Test with 5 Users. Jakob Nielsen's Alertbox (Mar. 19, 2000); http://www.useit.com/alertbox/20000319.html
[9] Phiriyapokanon, T. (2011). Is a big button interface enough for elderly users?: Towards user interface guidelines for elderly users. Ph.D. thesis, Mälardalen University, Sweden.
[10] Popa, A. (2012). Tracking hand tremor on touchscreen. Ph.D. Thesis, Computer Science Department, RWTH Aachen University.
[11] Polona Vilar. (2010). Designing the User Interface: Strategies for Effective Human-Computer Interaction (5th edition). J. Am. Soc. Inf. Sci. Technol. 61, 5 (May 2010), 1073–1074.
[12] Shneiderman, B., & Plaisant, C. (2016). Strategies for Effective Human-Computer Interaction / 5th Edition (5th ed.).
[13] Slavíček, T. (2014). Touch screen mobile user interface for seniors. Retrieved from https://medium.com/@tomasslavicek/designing-a-mobile-interface-for-older-people-1c9b70fd645c
[14] Thenganatt, M. A., & Jankovic, J. (2016). The relationship between essential tremor and Parkinson’s disease. Parkinsonism and Related Disorders, 22, S162–S165. https://doi.org/ 10.1016/j. parkreldis.2015.09.032
[15] Tremor Fact Sheet, National Institute of Neurological Disorders and Stroke. (2017). Retrieved January 26, 2018, from https://www.ninds.nih.gov/Disorders/Patient-Caregiver-Education/Fact-Sheets/ Tremor-Fact-Sheet
[16] Wacharamanotham, C. (2016). Drifts, slips, and misses: input accuracy for touch surfaces. Ph.D. Thesis, Faculty of Mathematics, Computer Science and Natural Sciences, RWTH Aachen University. https://doi.org/ht018890270
[17] Wacharamanotham, C., Jan Hurtmanns, Alexander Mertens, Martin Kronenbuerger, Christopher Schlick, & Jan Borchers. (2011). Evaluating swabbing: a touchscreen input method for elderly users with tremor. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '11). Association for Computing Machinery, New York, NY, USA, 623–626. https://doi.org/10.1145/ 1978942.1979031
[18] Wang, P. (2014). Is a multi-touch gesture interface based on a tablet better than a smart phone for elderly users?, M.Sc. Thesis, School of Computer and Mathematical Sciences, Auckland University of Technology. 128. Retrieved from http://aut.researchgateway.ac.nz/handle/ 10292/7655
