DÖÖS, Marianne; WILHELMSON, Lena; MADESTAM, Jenny; ÖRNBERG, Åsa. The Principle of Singularity: A Retrospective Study of How and Why the Legislation Process behind Sweden’s Education Act came to Prohibit Joint Leadership for Principals. Nordic Journal of Comparative and International Education (NJCIE), [S. l.], v. 2, n. 2-3, p. 39–55, 2018. DOI: 10.7577/njcie.2757. Disponível em: https://journals.oslomet.no/index.php/nordiccie/article/view/2757. Acesso em: 18 sep. 2025.