<hi xmlns="http://www.tei-c.org/ns/1.0" rend="bold" style="font-size:10pt">Daniel, T. C., Muhar, A., Arnberger, A., Aznar, O., Boyd, J. W., Chan, K. M. A., … von der Dunk, A.</hi> <hi xmlns="http://www.tei-c.org/ns/1.0" style="font-size:10pt" xml:space="preserve"> (2012): "Contributions of cultural services to the ecosystem services agenda"</hi>, in: <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic" style="font-size:10pt">Proceedings of the National Academy of Sciences of the United States of America</hi>, <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic" style="font-size:10pt">109</hi> <hi xmlns="http://www.tei-c.org/ns/1.0" style="font-size:10pt">(23), 8812–8819. doi: 10.1073/pnas.1114773109</hi>