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="COELLI, T" or (type any "bookEditor issueEditor" and editor="COELLI, T") Add to list Journal Article A1 open access Environmental efficiency measurement and the materials balance condition T COELLI, Ludwig Lauwers (UGent) and Guido Van Huylenbroeck (UGent) (2007) JOURNAL OF PRODUCTIVITY ANALYSIS. 28(1-2). p.3-12