Davies, A., Newport, L., Billington, O., & Gillespie, S. (1999). Length of time to laboratory diagnosis of Mycobacterium tuberculosis infection: Comparison of in-house methods with reference laboratory results. Journal of Infection, 39(3), pp. 205-208. doi:10.1016/s0163-4453(99)90050-6

Davies, Angharad, L.E Newport, O.J Billington, and S.H Gillespie. "Length of Time to Laboratory Diagnosis of Mycobacterium Tuberculosis Infection: Comparison of In-house Methods With Reference Laboratory Results." Journal of Infection 39, no. 3 (1999): 205-208.

Davies, Angharad, L.E Newport, O.J Billington, and S.H Gillespie. "Length of Time to Laboratory Diagnosis of Mycobacterium Tuberculosis Infection: Comparison of In-house Methods With Reference Laboratory Results." Journal of Infection 39.3 (1999): 205-208.