1. Health for all database,2007
2. Catastrophe and impoverishment in paying for health care: with applications to Vietnam 1993–98;Wagstaff;Health Economics,2003
3. Catastrophic payments for health care in Asia;van Doorslaer;Health Economics,2007
4. O’Donnell O, van Doorslaer E, Rannan-Eliya RP, Somanathan A, Garg CG, Hanvoravongchai P, et al. Explaining the incidence of catastrophic payments for health care: comparative evidence from Asia. EQUITAP Working Paper #5. Rotterdam, The Netherlands/Colombo, Sri Lanka: Erasmus University/Institute of Policy Studies; 2005.
5. A look at catastrophic medical expenses and the poor;Berki;Health Affairs,1986