ERBACHER, Christian Eric; ÖSTERMAN, Bernt. A Passport Photo of Two: On an Allusion in the Pictures of Wittgenstein and von Wright in Cambridge. Nordic Wittgenstein Review, [S. l.], v. 3, n. 1, p. 139–149, 2014. Disponível em: https://www.nordicwittgensteinreview.com/article/view/1948. Acesso em: 22 feb. 2025.