Sara Marlene 2021. The `Medium´ an Heuristic and Intermedial device – An Approach to the Exhibitions ´Meio Concreto´ de Alexandre Estrela, e ´Lua Cão` de Alexandre Estrela e João Maria Gusmão e Pedro Paiva . ARTis ON. 11 (Dec. 2021). DOI:https://doi.org/10.37935/iha.aon.2021.0002.