Fortunika, S. O., Harianto, H. and Suharno, S. (2021) “Posisi Kopi Robusta Indonesia di Pasar Jerman Menggunakan Metode Linear Approximate Almost Ideal Demand System”, Jurnal Agribisnis Indonesia (Journal of Indonesian Agribusiness), 9(1), pp. 29-42. doi: 10.29244/jai.2021.9.1.29-42.