Musthofa, Muhammad Wakhid, and Ari Suparwanto. “Keteramatan Sistem Deskriptor Kontinu”. Jurnal Fourier 1, no. 1 (April 30, 2012): 39–45. Accessed June 13, 2026. https://mail.fourier.or.id/index.php/FOURIER/article/view/6.