Mera-Urbano, Gladys Amanda, et al. “Postvaccination Seroconversion Against the Surface Antigen of Hepatitis B Virus, in Nursing Students”. Revista De La Facultad De Ciencias De La Salud Universidad Del Cauca, vol. 15, no. 3, Sept. 2013, pp. 12-16, https://revistas.unicauca.edu.co/index.php/rfcs/article/view/47.