SAPUTRA, Rudi; PRATOMO, Andrianto Indra; SUMIYANTO, Sumiyanto. Productivity Measurement of Urea Fertilizer Production at PT. X Using The Green Productivity Approach. Greenation International Journal of Engineering Science, [S. l.], v. 3, n. 4, p. 183–192, 2026. DOI: 10.38035/gijes.v3i4.691. Disponível em: https://research.e-greenation.org/GIJES/article/view/691. Acesso em: 20 jan. 2026.