Tho, M. S. “Beberapa Kriteria Pembebanan Optimum Ekonomi Alat-Alat Pembangkitan Termis”. Journal of Mathematical and Fundamental Sciences, vol. 3, no. 1, Feb. 2019, pp. 1-9, https://journals.itb.ac.id/index.php/jmfs/article/view/9787.