Aleksiev, Vladimir, Boyko Yavorov, and Daniel Markov. “Comprehensive Clinico-Demographic Analysis of Malignant Pleural Effusions in the Bulgarian Population: Insights from an Observational Case-Control Study”. Acta Medica Bulgarica 52, no. 2 (June 13, 2025): 44–51. Accessed June 18, 2025. https://journals.mu-sofia.bg/index.php/amb/article/view/212.