Fairly efficient or efficiently fair: success factors and constraints of payment and reward schemes for environmental services in Asia / Beria Leimona . Wageningen :  Wageningen University , 2011 . x, 163 s . Doktorandská dizertačná práca (PhD.). - Wageningen University . ISBN 978-94-6173-040-4 . [1, z toho požičaných 0]