Tumiwa, Johan Reineer, et al. “Trade Agreements and Agribusiness Export Performance: Ppml Gravity Evidence From Indonesian Palm Oil Hs 1511 (2015–2023)”. Jurnal Ilmiah PLATAX, vol. 14, no. 1, Feb. 2026, pp. 95-104, doi:10.35800/jip.v14i1.66808.