Cecchi, G., Ilemobade, A., Le Brun, Y., Hogerwerf, L., & Slingenbergh, J. (2008). Agro-ecological features of the introduction and spread of the highly pathogenic avian influenza (HPAI) H5N1 in northern Nigeria. Geospatial Health, 3(1), 7–16. https://doi.org/10.4081/gh.2008.227