Bariyaha N, Lau E. West Kalimantan-Sarawak border trade: Gravity model. kasetsart J. Soc. Sci. [internet]. 2019 Oct. 31 [cited 2026 Sep. 14];40(3):703-10. available from: https://so04.tci-thaijo.org/index.php/kjss/article/view/242339