Aleksiev, Vladimir, et al. “Comprehensive Clinico-Demographic Analysis of Malignant Pleural Effusions in the Bulgarian Population: Insights from an Observational Case-Control Study”. Acta Medica Bulgarica, vol. 52, no. 2, June 2025, pp. 44-51, https://doi.org/10.2478/AMB-2025-0043.