ACETO, Luca; FOKKINK, Willem Jan; GLABBEEK, Rob J. van; INGÓLFSDÓTTIR, Anna. Nested Semantics over Finite Trees are Equationally Hard. BRICS Report Series, [S. l.], v. 10, n. 27, 2003. DOI: 10.7146/brics.v10i27.21795. Disponível em: https://tidsskrift.dk/brics/article/view/21795. Acesso em: 5 dec. 2025.