Bambang Sugandi and Erna Apriliani (2007) “Konstruksi Matriks NonNegatif Simetri dengan Spektrum Bilangan Real”, Limits: Journal of Mathematics and Its Applications, 4(1), p. 17. vailable at: https://journal.its.ac.id/index.php/limits/article/view/5380 (ccessed: 6December2025).