Adnan, A., E. R. Alika, D. D. Silalahi, F. R. Aulia, and G. Erda. “STATISTICAL MODELING FOR DOWNSCALING USING PRINCIPAL COMPONENT REGRESSION AND DUMMY VARIABLES: A CASE OF SIAK DISTRICT”. BAREKENG: Jurnal Ilmu Matematika Dan Terapan, Vol. 20, no. 2, Jan. 2026, pp. 1643–1658, doi:10.30598/barekengvol20iss2pp1643–1658.