Greening livestock: Assessing the potential of payment for environmental services in livestock inclusive agricultural production systems in developing countries - Silvestri, Silvia; Osano, Philip M.; Leeuw, Jan de; Herrero, Mario; Ericksen, Polly J.; Kariuki, Juliet B.; Njuki, Jemimah; Bedelian, Claire; Notenbaert, An Maria Omer (International Livestock Research Institute, 2012)