Deddy Wahyudin Purba, Suswati, and Zulheri Noer. “THE CULTIVATION POTENTIAL OF INTERCROPPING CORN WITH IMMATURE PLANTS IN COCONUT PLANTATIONS OF ASAHAN REGENCY”. Proceedings of The International Conference on Multi-Disciplines Approaches for The Sustainable Development, Mar. 2023, pp. 643-8, https://eproceeding.undwi.ac.id/index.php/mdasd/article/view/346.