1. Angel, H.-F. (2021). A process of merging the interior and exterior reality: A short view on the structure of credition. In M.-T. Teixeira, M. Reker, & A. Berve (Eds.), Mind in nature: Bridging process philosophy and neoplatonism (pp. 201–219). Cambridge Scholars.
2. Angel, H. -F. (2022). Credition: Fluides Glauben [Credition: Fluid faith]. Deutscher Wissenschafts-Verlag.
3. Arana, J. (2012). Los sótanos del universo. La determinación natural y sus mecanismos ocultos [The cellars of the universe. Natural determination and its hidden mechanisms]. Biblioteca Nueva.
4. Araujo, M. (2017). The ethics of cognitive enhancement: Flynn effect and the natural talents fallacy. Ethic@: An International Journal for Moral Philosophy, 16(1), 1–14.
5. Artigas, M. (2000). The mind of the universe: Understanding science and religion. Templeton Foundation Press.