M. Shahid Alam: Global Disparities Since 1800: Trends and Regional Patterns http://jwsr.ucr.edu/archive/vol12/number1/pdf/jwsr-v12n1-alam.pdf
Robert Biel: The Interplay between Social and Environmental Degradation in the Development of the International Political Economy http://jwsr.ucr.edu/archive/vol12/number1/pdf/jwsr-v12n1-biel
