Jeroen C.J.M. van den Bergh (2001). "Ecological Economics: Themes, Approaches, and Differences with Environmental Economics," Regional Environmental Change, 2(1), pp. 13-23பரணிடப்பட்டது 2008-10-31 at the வந்தவழி இயந்திரம் (press +).
web.archive.org
Jeroen C.J.M. van den Bergh (2001). "Ecological Economics: Themes, Approaches, and Differences with Environmental Economics," Regional Environmental Change, 2(1), pp. 13-23பரணிடப்பட்டது 2008-10-31 at the வந்தவழி இயந்திரம் (press +).