Policies and institutions for assuring pro-poor rural development and food security through bioenergy production : case studies on bush-to-energy and Jatropha in Namibia / Michael Brüntrup, Katharina Becker, Martina Gaebler, Raoul Herrmann, Silja Ostermann, Jan Prothmann. Bonn : Deutsches Institut für Entwicklungspolitik gGmbH, 2016