Title: Economic Development and Environmental Quality: An Econometric Analysis
Author(s): Nemat Shafik
Source: Oxford Economic Papers Vol. 46, pp. 757-773
Stable URL: http://www.jstor.org/pss/2663498

Title: The Environment as a Factor of Production: The Effects of Economic Growth and Trade Liberalization
Author(s): Lopez Ramon
Source: Journal of Environmental Economics and Management Vol. 27, pp. 163-184
Stable URL: http://www.sciencedirect.com/science/article/pii/S0095069684710321

Title: Income and environmental R&D: empirical evidence from OECD countries
Author(s): MARINUS H.C. KOMEN, SHELBY GERKING and HENK FOLMER
Source: Environment and Development Economics Vol. 2, pp. 505-515
Stable URL: http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=69552