NUGROHO, T. D.; IRIANI, I. Independent Production of Regular Portland Cement Assessed by Simulation and Net Present Value: Produksi Mandiri Semen Portland Biasa dievaluasi melalui simulasi dan Nilai Sekarang Bersih (NPV). Indonesian Journal of Innovation Studies, [S. l.], v. 26, n. 4, p. 10.21070/ijins.v26i4.1603, 2025. DOI: 10.21070/ijins.v26i4.1603. Disponível em: https://ijins.umsida.ac.id/index.php/ijins/article/view/1603. Acesso em: 5 dec. 2025.