Joyce K. Nthiiri, George O. Lawi, Alfred Manyonge
      Mathematical model of pneumonia and HIV/AIDS co-infection in the presence of protection
      International Journal of Mathematical Analysis, Vol. 9, 2015, no. 42, 2069-2085
      http://dx.doi.org/10.12988/ijma.2015.55150

Copyright © 2015 Joyce K. Nthiiri, George O. Lawi and Alfred Manyonge. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.