Fernández-Gámez, Manuel Angel, Elias Bendodo-Benasayag, José Ramón Sánchez.Serrano, and Maria Helena Pestana. 2020. “Hybrid Preference Assessment for Tourism Research Using Solicited and Unsolicited Opinions: An Application in Rural Tourism”. Tourism & Management Studies 16 (3): 7-13. https://www.tmstudies.net/index.php/ectms/article/view/1331.