PHUAPONG, S.; SUNGTONG, N. Some Algebraic Properties of Regular Tree Transformations. Communications in Mathematics and Applications, [S. l.], v. 10, n. 4, p. 809–819, 2019. DOI: 10.26713/cma.v10i4.1273. Disponível em: http://www.journals.rgnpublications.com/index.php/cma/article/view/1273. Acesso em: 16 jun. 2025.