HARRISON, John; URBAN, Josef; WIEDIJK, Freek. Preface: Twenty Years of the QED Manifesto. Journal of Formalized Reasoning, [S. l.], v. 9, n. 1, p. 1–2, 2016. DOI: 10.6092/issn.1972-5787/5974. Disponível em: https://jfr.unibo.it/article/view/5974. Acesso em: 27 jul. 2024.