BALLON VILLANUEVA, R. 2018. Explicatio and ratio naturae. Medieval Understandings of the Origin of the Universe. Universidad de Navarra, Pamplona (Spain), 16 January 2018. Organiser: Maria Jesús Soto-Bruna (Universidad de Navarra. Revista Española de Filosofía Medieval. 25, (Dec. 2018), 261–263. DOI:https://doi.org/10.21071/refime.v25i.11653.