Saorí­n T, Pastor-Sánchez J-A. From mobile-first to data-first: Schema.org, zero-click searches and the uncertainty about voice assistants. ThinKEPI [Internet]. 2020 May 10 [cited 2026 May 7];14. Available from: https://thinkepi.scimagoepi.com/index.php/ThinkEPI/article/view/thinkepi.2020.e14f04