HILDEBRANDT, T. T.; SASSONE, V. Transition Systems with Independence and Multi-Arcs. BRICS Report Series, [S. l.], v. 4, n. 10, 1997. DOI: 10.7146/brics.v4i10.18801. Disponível em: https://tidsskrift.dk/brics/article/view/18801. Acesso em: 28 mar. 2024.