Simamora, Arfan Nazhri, Diny Dinarti, and Sudarsono Sudarsono. 2020. “Validation of Zeatin Analysis Method Using Ultra High Performance Liquid Chromatography (UHPLC) Technique on Oil Palm (Elaeis Guineensis Jacq.) In Vitro Culture Study”. Jurnal Penelitian Kelapa Sawit 28 (1), 15-28. https://doi.org/10.22302/iopri.jur.jpks.v28i1.99.