A. Hernández-Vásquez and H. Chacón-Torrico, “Manipulation, analysis, and visualization of data from the demographic and family health survey with the R program”, Rev Peru Med Exp Salud Publica, vol. 36, no. 1, pp. 128–33, Mar. 2019, doi: 10.17843/rpmesp.2019.361.4062.