Hakim, Lukman, and Azwar Riza Habibi. “Perbandingan Skema Numerik Metode Finite Difference Dan Spectral”. Jurnal Ilmiah Teknologi Informasi Asia, vol. 10, no. 2, Aug. 2016, pp. 34-40, https://jurnal.stmikasia.ac.id/index.php/jitika/article/view/80.