Mathiasová, Alexandra, Martin Solík, and Juliána Mináriková. “Paid Subscriptions and Premium Content: Online News Publishers’ Monetisation Strategies”. Communication Today 13, no. 1 (April 24, 2022): 18–27. Accessed April 19, 2026. https://communicationtoday.fmk.ucm.sk/index.php/ct/article/view/59.