Docki Saraswati, Debbie Kemala Sari , Shelina Putri Kurniadi. “Minimizing Total Tardiness in Parallel Machines With Simulated Annealing Using Python”. International Journal of Advanced Science and Technology, Vol. 29, no. 05, Apr. 2020, pp. 645 -4, http://sersc.org/journals/index.php/IJAST/article/view/9593.