Impact of glycerol on oil palm trunk starch bioplastics enhanced with citric-acid epoxidized palm oil oligomers oleh Habib Hernando, Marpongahtun, Elisa Julianti, Arif Nuryawan, Suci Aisyah Amaturrahim, Averroes Fazlur Rahman Piliang, Muhammad Rafiq Yanhar, Ronn Goei, Nattakan Soykeabkaew, A. Muhammad Afdhal Saputra, Saharman Gea