Asbur Y, Yahyar S, Murtilaksono K, . S, Sutarta ES. Study of Asystasia gangetica (L.) Anderson Utilization as Cover Crop under Mature Oil Palm with Different Ages. IJSBAR. 2015;19(2):137-148. Accessed September 16, 2025. https://gssrr.org/JournalOfBasicAndApplied/article/view/3315