Gómez Alonso, Modesto M. “Existence and Actuality: Hartshorne on the Ontological Proof and Immanent Causality”. Logos. Anales del Seminario de Metafísica, vol. 46, July 2013, pp. 125-47, https://doi.org/10.5209/rev_ASEM.2013.v46.42867.