OETAMA, Raymond Sunardi; HENG, Tan Thing; TJAHJANA, David. Sebuah Pola Cluster Geospatial Eksplorasi Kejahatan Narkoba di DKI Jakarta. Ultima InfoSys : Jurnal Ilmu Sistem Informasi, [S. l.], v. 11, n. 1, p. 57–62, 2020. DOI: 10.31937/si.v9i1.1514. Disponível em: https://ejournals.umn.ac.id/index.php/SI/article/view/1514. Acesso em: 17 may. 2025.