Nugroho, T. D. and Iriani, I. (2025) “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, 26(4), p. 10.21070/ijins.v26i4.1603. doi: 10.21070/ijins.v26i4.1603.