1. Academic Consortium on International Trade(2000).Letter to University Presidents(29 July).http://www.fordschool.umich.edu/rsie/acit/Documents/Anti‐SweatshopLetterPage.html.
2. Expanding opportunity at the base of the pyramid;Altman D.G.;People & Strategy,2009
3. World Bank Discussion Paper No. 0115;Alwang J.,2001
4. Strategic innovation at the base of the pyramid;Anderson J.L.;MIT Sloan Management Review,2007