Firszt, Dawid. “Factualism of David Armstrong”. Acta Universitatis Lodziensis. Folia Philosophica. Ethica-Aesthetica-Practica, no. 24 (January 1, 2011): 105–120. Accessed May 20, 2024. https://czasopisma.uni.lodz.pl/philosophica/article/view/18771.