Oracle Gave Amazon a Discount on Java to Keep Android Off the Paperwhite – Wait, What? [online]. the-digital-reader.com, [cit. 2021-11-01]. Dostupné online.
yavitrina.ru
7 лучших электронных книг 2021 года [online]. yavitrina.ru, [cit. 2021-11-01]. Dostupné online.