Neumayer, Eric (2004). «The environment, left-wing political orientation, and ecological economics». Ecological Economics. 51 (3–4): 167–175. ISSN0921-8009. doi:10.1016/j.ecolecon.2004.06.006
Neumayer, Eric (2004). «The environment, left-wing political orientation, and ecological economics». Ecological Economics. 51 (3–4): 167–175. ISSN0921-8009. doi:10.1016/j.ecolecon.2004.06.006