1. Nagelkerke NJD, Plummer FA, Holton D, ANZALA A.O., Manji F, Ngugi NE, Moses S.(1990). Transition Dynamics of HIV Disease in a Cohort of African Prostitutes: A Markov model approach. AIDS 1990; 4(8): 743-747

2. Moses S, Plummer FA, Ngugi EN, Nagelkerke NJD, ANZALA A.O., Ndinya-Achola JO (1991). Controlling HIV in Africa: Effectiveness and cost of an intervention in a high frequency STD transmitter core group. AIDS 1991; 5(4): 407-11.

3. Kreiss JK, Ngugi E, Holmes K, Ndinya-Achola J, Waiyaki P, Roberts PL, Ruminjo I, Sajabi R, Kimata J, Flemming TR, ANZALA AO, Holton D, Plummer F. (1992) Efficacy of nonoxnol-9 contraceptive sponge use in preventing heterosexual acquisition of HIV in Nairobi prostitutes. J Amer Med Assoc 1992; 268(4): 477-82.

4. ANZALA AO, Nagelkerke NJD, Bwayo JJ, Holton D, Moses S, Ngugi EN, Ndinya-Achola JO, Plummer FA. (1995). Rapid Progression to Disease in African Sex Workers HIV Type I Infection. J. Infect Dis 1995: 171(3): 686-9.

5. Bwayo JJ, Nagelkerke NJD, Moses S, Embree J, Ngugi EN, Mwatha A, Kimani J, ANZALA AO, Choundhri S, Ndinya-Achola JO, Plummer FA. (1995) Comparison of the declines in CD4 counts in HIV-1-seropositive female sex workers and women from the general population in Nairobi, Kenya. J. AIDS Human Retrovirol 1995; 10:457-61.

6. Kimani J, Bwayo JJ, ANZALA AO, Maclean I, Mwatha A, Choudhri SH, Plummer FA, Ronald AR. Low Dose Erythromycin Regimen for the Treatement of Chancroid. East African Med. J. 1995: 72(10):645-8.

7. Kakai R, Bwayo JJ, Wamola IA, Ndinya-Achola JO, ANZALA AO, Plummer FA et al. Breastfeeding and immunity to intestinal infections. East Africa Med. J. 1995 Mar; 72(3): 150-4

8. Fowke KR, Nagelkerke NJD, Kimani J, Simosen JN, ANZALA AO, Bwayo JJ, MacDonald KS, Ngugi EN, Plummer FA. Resistance to HIV-1 Infection Among Persistently Seronegative Prostitutes in Nairobi, Kenya. Lancet 1996; 348: 1347-51.