Boyanova, L., Boyanova, L., Yordanov, D., Gergova, R., & Markovska, R. (2026). Distribution and Evolution of cagA, cagE, and vacA Genes among Helicobacter pylori Isolates in Bulgaria. Proceedings of the Bulgarian Academy of Sciences, 79(7), 923–930. https://doi.org/10.7546/CRABS.2026.07.09