Isnein Akbar and Abdulah Muzakar 2026. Integrating WhatsApp-only Citizen Reporting and GIS Spatial Analysis (Kernel Density–Buffer–Network Distance) to Prioritize Solid Waste Service Interventions: A Case Study of Kalijaga Village, Aikmel District. International Journal of Health Engineering and Technology. 4, 5 (Jan. 2026). DOI:https://doi.org/10.55227/ijhet.v4i5.569.