Severo, L. C., et al. “Probable Pulmonary Cryptococcosis Caused by Non-Capsulated Cryptococcus Neoformans”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 23, no. 6, Dec. 1981, pp. 283-6, https://www.revistas.usp.br/rimtsp/article/view/197249.