Asmara, Sandi and Rahmawati, Winda and Suharyatun, Siti and Wibowo, Sasongko Aji (2019) Optimalization of upja revenue (business provider services) rice cultivation using linear programing analysis in seputih raman district, central Lampung. In: The 3rd International Symposium on Agricultural and Biosystem Engineering, 6-8 Agustus 2019, South Sulawesi, Indonesia.