Show 10 5 10 15 20 50 100 250 Sort by year (new to old) Actions Download search results Subscribe to news feed Your filters: cql: author="Van Opstal, Maarten" or (type exact bookEditor and editor="Van Opstal, Maarten") Add to list Journal Article A2 Knowledge for sustainable development: a worldview's perspective Maarten Van Opstal and Jean Hugé (UGent) (2013) ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY. 15. p.687-709