System Expansion and Substitution in LCA: A Lost Opportunity of ISO 14044 Amendment 2 - Heijungs, Reinout; Allacker, Karen; Benetto, Enrico; Brandão, Miguel; Guinée, Jeroen; Schaubroeck, Simon; Schaubroeck, Thomas; Zamagni, Alessandra (Frontiers in Sustainability, 2021)