Kariuki, M. and Schwartz, J., “Small-scale private service providers of water supply and electricity : a review of incidence, structure, pricing, and operating characteristics”, vol. 3727. World Bank, Washington, DC, USA, p. 38 p. : 2 boxes, 3 fig., 10 tab., 2005.

Drees-Gross, F., Schwartz, J., Sotomayor, M.A., and Bakalian, A., “Output-based aid in water : lessons in implementation from a pilot in Paraguay : OBApproaches note 07”. p. 4 p.; 1 tab.; 1 box.