MOURELATOS, Evangelos; NIKOS FRARAKIS; MANOLIS TZAGARAKIS. A Study on the Evolution of Crowdsourcing Websites. European Journal of Social Science Education and Research, London, U.K., v. 5, n. 3, p. 01–18, 2018. DOI: 10.26417/ejser.v11i1.p29-40. Disponível em: https://revistia.com/index.php/ejser/article/view/409. Acesso em: 4 apr. 2025.