1.Cliff AD, Haggett P, Smallman-Raynor M. Measles: An Historical Geography of a Major Human Viral Disease from Global Expansion to Local Retreat, 1840–1990. Oxford, UK; Cambridge, MA, USA: Blackwell, 1993, 462 pp.
2.McLean AR, Anderson RM. Measles in developing countries. 2. The predicted impact of mass vaccination. Epidemiology and Infection 1988; 100: 419–442.
3.Strebel P, et al. The unfinished measles immunization agenda. Journal of Infectious Diseases 2003; 187: S1–S7.
4.Nandy R, et al. Case-fatality rate during a measles outbreak in Eastern Niger in 2003. Clinical Infectious Diseases 2006; 42: 7.
5.Grais RF, et al. Unacceptably high mortality related to measles epidemics in Niger, Nigeria, and Chad. PLOS Medicine 2007; 4: 122–129.
6.Fine PEM, Clarkson JA. Measles in England and Wales.1. An analysis of factors underlying seasonal patterns. International Journal of Epidemiology 1982; 11: 5–14.
7.Fine PEM, Clarkson JA. Measles in England and Wales. 3. Assessing Published predictions of the impact of vaccination on incidence. International Journal of Epidemiology 1983; 12: 332–339.
8.Bolker B, Grenfell B. Space, persistence and dynamics of measles epidemics. Philosophical Transactions of the Royal Society of London Series B: Biological Sciences 1995; 348: 309–320.
9.Earn DJD, et al. A simple model for complex dynamical transitions in epidemics. Science 2000; 287: 667–670.
10.Grenfell BT, Bjornstad ON, Kappey J. Travelling waves and spatial hierarchies in measles epidemics. Nature 2001; 414: 716–723.
11.Bjornstad ON, Finkenstadt BF, Grenfell BT. Dynamics of measles epidemics: Estimating scaling of transmission rates using a time series SIR model. Ecological Monographs 2002; 72: 169–184.
12.Schenzle D. An age-structured model of pre- and post-vaccination measles transmission. IMA Journal of Mathematics Applied in Medicine and Biology 1984; 1: 169–191.
13.Bartlett MS. Measles periodicity and community size. Journal of the Royal Statistical Society Series A: General 1957; 120: 48–70.
14.Ferrari MJ, et al. The dynamics of measles in sub-Saharan Africa. Nature 2008; 451: 679–684.
15.Niger Ministry of Health. Written communication, 2008.
16.Faulkingham RH, Thorbahn PF. Population dynamics and drought: a village in Niger. Population Studies 1975; 29: 463–477.
17.Raynaut C. Societies and nature in the Sahel: ecological diversity and social dynamics. Global Environmental Change 2001; 11: 9–18.
18.Rain D. Eaters of the Dry Season: Circular Labor Migration in the West African Sahel. Boulder, CO: Westview Press, 1999, 266 pp.
19.Grenfell BT, Bjornstad ON, Finkenstadt BF. Dynamics of measles epidemics: scaling noise, determinism, and predictability with the TSIR model. Ecological Monographs 2002; 72: 185–202.
20.Central Intelligence Agency. World Factbook. Washington, D.C.: Central Intelligence Agency, 2009.
21.WHO. World health statistics: health service coverage indicators. WHO Global Health Atlas. World Health Organization, 2003.
22.IRIN News. Nigeria: Measles kills more than 500 children so far in 2005. IRIN. Abuja: UN Office for the Coordination of Humanitarian Affairs, 2005.
23.Costa GD.Measles outbreak hits Northern Nigerian state. Voice of America. Abuja (voanews.com), 2008.
24.Keeling MJ, Grenfell BT. Understanding the persistence of measles: reconciling theory, simulation and observation. Proceedings of the Royal Society of London Series B: Biological Sciences 2002; 269: 335–343.
25.Xia YC, Bjornstad ON, Grenfell BT. Measles metapopulation dynamics: a gravity model for epidemiological coupling and dynamics. American Naturalist 2004; 164: 267–281.
26.Bjornstad ON, Grenfell BT. Hazards, spatial transmission and timing of outbreaks in epidemic metapopulations. Environmental and Ecological Statistics, 2008; 15: 265–277.
27.World Health Organization Regional Office for Africa. Evaluation guidelines for measles supplemental immunization activities, 2006.
28.Yameogo KR, et al. Migration as a risk factor for measles after a mass vaccination campaign, Burkina Faso, 2002. International Journal of Epidemiology 2005; 34: 556–564.
29.Camargo MCC, et al. Predictors related to the occurence of a measles epidemic in the city of Sao Paulo in 1997. Revista Panamericana de Salud Pública 2000; 7: 359–365.
30.Moran PAP. Notes on continuous stochastic phenomena. Biometrika 1950; 37: 17–23.
31.Wolfson LJ, et al. Has the 2005 measles mortality reduction goal been achieved? A natural history modelling study. Lancet 2007; 369: 191–200.
32.NOAA National Weather Service. NOAA CPC Morphing Technique (‘CMORPH’). 2009.
33.Hijmans R, et al. Global Administrative Areas (version 0.9). University of California, Berkeley, Museum of Vertebrate Zoology, and the International Rice Research Institute, 2008.
34.Balk D, et al. Determining global population distribution: methods, applications and data. Advances in Parasitology 2006; 62: 119–156.
35.Center for International Earth Science Information Network (CIESIN). Columbia University and Centro Internacional de Agricultura Tropical (CIAT). Gridded Population of the World Version 3 (GPWv3): Population Density Grids. Palisades: Socioeconomic Data and Applications Center (SEDAC), Columbia University, 2005.
36.FEWS NET. Africa Data Dissemination Service.
37.National Imagery and Mapping Agency. VMAP0. National Imagery and Mapping Agency, 1997.
38.Miles WFS. Development, not division: local versus external perceptions of the Niger-Nigeria boundary. Journal of Modern African Studies 2005; 43: 297–320.
39.Vennemann K. The population of Niger – distribution and development. In: von Oppen M, ed. Adapted Farming in West Africa: Issues, Potentials and Perspectives. University of Hohenheim, 2000, pp. 83–88.