Aini, Qurratul. “Analisis Eksistensi Infimum Image Dari Fungsi Lower Semi-Continuous Dari Atas”. EIGEN MATHEMATICS JOURNAL 1, no. 1 (June 28, 2018): 23–27. Accessed May 6, 2024. https://www.eigen.unram.ac.id/index.php/eigen/article/view/4.