Working Paper
Den Boon, S, N W White, S W Van Lill, M W Borgdorff, S Verver, C J Lombard, E D Bateman, E Irusen, D A Enarson, and N Beyers.
"An evaluation of symptom and chest radiographic screening in tuberculosis prevalence surveys." The International Journal of Tuberculosis and Lung Disease 10, no. 8 (2006): 876-882.