Khairani, S., H. P. Sari, Z. Fadhly, and H. Y. Simbolon. “Effect of Cow Manure and Increasing the Dose of Urea Fertilizer on the Growth of Mustard Greens (Brassica Juncea L.)”. Contributions of Central Research Institute for Agriculture, vol. 20, no. 1, Jan. 2026, pp. 17-22, https://ejournal.cria.or.id/index.php/ccria/article/view/368.