1. Akin J, Birdsal N, de Ferranti D (1987) Financing health services in developing countries: an agenda for reform. A World Bank Policy Study. The World Bank, Washington, DC
2. Amporfu E (2010) Incentives effects government mandated cost shifting. J Sci Technol 30(2):36–49
3. Baby Centre, Vaginal birth after caesarean. http://www.babycentre.co.uk/pregnancy/labourandbirth/labourcomplications/vbac/
4. Biglaiser G, Albert Ma C (2003) Moonlighting: public service and private practice. http://www.econ.unavarra.es/seminarios/Seminarios%20antiguo/papers%200304/moonlighting-dec2003.pdf
5. Brekke KI, Nuscheler R, Straume OR (2005) Gatekeeping in health care. CESifo Working Paper No. 1552, http://www.cesifo.de/pls/guestci/download/CESifo%20Working%20Papers%202005/CESifo%20Working%20Papers%20September%202005/cesifo1_wp1552.pdf