1. Aicher J, Asiimwe F, Batchuluun B, Hauschild M, Zöhrer M, Egger R (2016) Online hotel reviews: rating symbols or text… text or rating symbols? That is the question! In: Inversini A, Schegg R (eds) Information and communication technologies in tourism 2016. Springer, Basel
2. Aldi F (2015, February) Exploring the relevant factors influencing usability of the online booking process on individual hotel websites applying the eye-tracking method - The case of three four-star hotels in the city of Lugano (Switzerland), Master Thesis, Università della Svizzera italiana, Lugano, Faculties of Economics and Communication Sciences, Master in international tourism
3. Bergstrom JR, Schall A (2014) Eye-tracking in user experience design. Elsevier, Waltham
4. Bojko A (2005, January) Eye-tracking in user experience testing: how to make the most of it, White Paper, User Centric
5. Bojko A (2013) Eye-tracking the user experience: a practical guide to research. Rosenfeld Media, New York