Muktamar, Z., Adiprasetyo, T., Yulia, Suprapto, Sari, L., Fahrurrozi, F., and Setyowati, N. 2018. “Residual effect of vermicompost on sweet corn growth and selected chemical properties of soils from different organic farming practices”. International Journal of Agricultural Technology 14 (7):1471-82. https://li04.tci-thaijo.org/index.php/IJAT/article/view/8656.