Neswati, R. ., C. . Lopulisa, and M. . Nathan. “Improving Quality of Nickel Post-Mining Soil Using Mycorrhiza and Biochar Made from Oil Palm Empty Fruit Bunch”. Food and Agricultural Sciences : Polije Proceedings Series, vol. 3, no. 1, Dec. 2020, pp. 197-03, https://proceedings.polije.ac.id/index.php/food-science/article/view/164.