(1)Stochastic convergence of per capita carbon dioxide emissions and multiple structural breaks in OECD countries
Economic Modelling
Volume 26, Issue 6, November 2009, Pages 1375-1381
http://dx.doi.org/10.1016/j.econmod.2009.07.003

(2)New evidence on the convergence of per capita carbon dioxide emissions from panel seemingly unrelated regressions augmented Dickey–Fuller tests
Energy
Volume 33, Issue 9, September 2008, Pages 1468-1475
http://dx.doi.org/10.1016/j.energy.2008.05.002

(3)On the non-convergence of energy intensities: Evidence from a pair-wise econometric approach
Ecological Economics
Volume 69, Issue 3, 15 January 2010, Pages 641-650
http://dx.doi.org/10.1016/j.ecolecon.2009.10.001

(4)Energy consumption and GDP in developing countries: A cointegrated panel analysis

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Energy Economics
Volume 27, Issue 3, May 2005, Pages 415-427
http://dx.doi.org/10.1016/j.eneco.2005.03.003