Mohd Iqbal Muttaqin, Oktalia Triananda Lovita, Zharifah Muthiah, Khairunnisa, and Ira Sharfina. “Adaptive Fiscal Policy for Indonesian Coffee: A Reduced State-Space Linear Quadratic Tracking Approach”. Jurnal Inotera, Vol. 11, no. 1, Jan. 2026, pp. 59-65, doi:10.31572/inotera.Vol11.Iss1.2026.ID606.