Mat Nayan, N. H., M. S. A. Hamzah, A. A.- hakimi Mohd Tahir, A. A. A. Rajali, E. F. Muslih, and R. Mazlan. “Development of Polyvinyl Alcohol/Chitosan Hydrogel Loaded With Fertilizer Compound: Preparation, Properties and Effect on Seed Germination”. Journal of Science and Technology, Vol. 10, no. 4, Dec. 2018, https://publisher.uthm.edu.my/ojs/index.php/JST/article/view/3649.