Conceição, R. T. “Building the Transmontane Frontier Between the 12th and the 13th Centuries: From the Role of the Crown to the Local Powers”. História: Revista Da Faculdade De Letras Da Universidade Do Porto, vol. 11, no. 2, Jan. 2022, https://ojstest.xyz/ojsletras/index.php/historia/article/view/10859.