Datta, S. S., S. Toikilik, B. Ropa, G. Chidlow, and W. Lagani. “Pertussis Outbreak in Papua New Guinea: The Challenges of Response in a Remote Geo-Topographical Setting”. Western Pacific Surveillance and Response, vol. 3, no. 4, May 2013, doi:10.5365/wpsar.2012.3.3.008.