Gandhy A, Harianto, NurmalinaR, Suharno. The Efficiency of The Spot Market And Crude Palm Oil (CPO) Commodity Futures Market Before and During The Covid-19 Pandemic in Indonesia. jma [Internet]. 2022Mar.31 [cited 2024May8];19(1):139. Available from: https://jurnal.ipb.ac.id/index.php/jmagr/article/view/40165