1. Progress toward poliomyelitis eradication—India, 1998;MMWR Morbidity and mortality weekly report,1998
2. Tracking progress towards global polio eradication, 2010–2011;Wkly Epidemiol Rec,2012
3. NPSP. A Government of India- WHO Collaboration. website http://www.npspindia.org/ accessed 10 August 2015 [updated website http://www.npspindia.org/ accessed 10 August 2015; cited 2015 10-08-2015]; Available from.
4. Progress toward poliomyelitis eradication—India, January 2010—September 2011;MMWR Morbidity and mortality weekly report,2011
5. Role of enterovirus 71 in acute flaccid paralysis after the eradication of poliovirus in Brazil;EE Da Silva;Emerging infectious diseases,1996