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							MURTI, A.S.; 						MANUABA, I.B.G.; 						ARJANA, I.G.D.
 OPTIMASI UNIT PLTU BERBAHAN BAKAR BATUBARA MENGGUNAKAN METODE LAGRANGE DI PT. INDONESIA POWER UP SURALAYA.
<strong>Jurnal SPEKTRUM</strong>, [S.l.], v. 7, n. 1, p. 76-82, mar. 2020.
ISSN 2684-9186.
Available at: &lt;<a href="https://ojs.unud.ac.id/index.php/spektrum/article/view/58121" target="_new">https://ojs.unud.ac.id/index.php/spektrum/article/view/58121</a>&gt;. Date accessed: 28 aug. 2026.
doi: <a href="https://doi.org/10.24843/SPEKTRUM.2020.v07.i01.p11">https://doi.org/10.24843/SPEKTRUM.2020.v07.i01.p11</a>.