Llangarí Cujilema, J., G. Velásquez Serra, and E. Espinosa Caiza. “ Knowledge, Risk Perception and Quantification of Hepatitis B Surface Antigen Antibodies in Clinical Laboratory W”. Revista Venezolana De Salud Pública, vol. 9, no. 2, Nov. 2021, pp. 47-54, https://revistas.uclave.org/index.php/rvsp/article/view/3468.