eva, darnila, Maryana, and Martunis. “Infant Routine Monitoring System During 0-12 Months Immunization Using Agglomerative Hierarchical Clustering Algorithm”. International Journal of Data Science, Computer Science and Informatics Technology (InJODACSIT), vol. 1, no. 2, Dec. 2021, pp. 1-6, http://ojs.polmed.ac.id/index.php/InJODACSIT/article/view/569.