Simon, D., K. E. Greyling, E. M. Irusen, J. Rigby, J. J. Taljaard, and C. F. N. Koegelenberg. “<i>Pneumocystis jiroveci</i> And Cytomegalovirus Co-Infection in an Immunocompromised Patient”. African Journal of Thoracic and Critical Care Medicine, vol. 22, no. 1, Apr. 2023, pp. 20-21, https://www.ajol.info/index.php/ajtccm/article/view/245563.