1. AA.VV. (2019): «Average daily time spent online via mobile by internet users worldwide in 2019, by age and device», Statista. https://www.statista.com/statistics/416850/average-duration-of-internet-use-age-device/#statisticContainer [10/03/2021].
2. AA.VV. (2020): The state of mobile in 2020: The key stats you need to know. https://www.appannie.com/en/insights/market-data/state-of-mobile-2020-infographic/ [04/05/2021]
3. AA.VV. (2020): «Number of apps available in leading app stores in 2019», Statista. https://www.statista.com/statistics/276623/number-of-apps-available-in-leading-app-stores/ [07/11/2021]
4. AA.VV. (2020): «How much time does the average person spend on their phone?», Kommando Tech. https://kommandotech.com/statistics/how-much-time-does-the-average-person-spend-on-their-phone/ [15/09/2021]
5. Averna, Carmelo (2020): «L’apprendimento mobile oltre la classe di italiano LS: atteggiamenti e punti di vista degli apprendenti a confronto», in A. López Márquez, F. Molina Castillo (ed.), Italiano y Español. Estudios de traducción, lingüística contrastiva y didáctica, Berlin, Peter Lang, pp. 435-447.