RAVN, Anders P.; STAUNSTRUP, Jørgen. Synchronized Transitions. DAIMI Report Series, [S. l.], v. 16, n. 219, 1987. DOI: 10.7146/dpb.v16i219.7570. Disponível em: https://tidsskrift.dk/daimipb/article/view/7570. Acesso em: 5 feb. 2026.