C. van den Berg, Pattanayak, S., Yang, J. - C., et Gunatilake, H.,
« Getting the assumptions right : private sector participation transaction design and the poor in southwest Sri Lanka », vol. no. 7. World Bank, Washington, DC, USA, p. iv, 21 p. : 7 tab., 2006.
H. Gunatilake, Yang, J. - C., Pattanayak, S., et van den Berg, C.,
« Willingness-to-pay and design of water supply and sanitation projects : a case study », vol. no. 19. Asian Development Bank, Manila, Philippines, p. vii, 30 p. : fig., 2006.