Najib, Mohamad Khoirun, and Sri Nurdiati. 2026. “Heterogeneous Correlation Mapping Between Rainfall Variability in Lake Toba and Indian Ocean Sea Surface Temperature”. (IJCSAM) International Journal of Computing Science and Applied Mathematics 12 (1):7-12. https://doi.org/10.12962/j24775401.ijcsam.v12i1.7665.