https://journal.ubb.ac.id/machine/issue/view/226
https://journal.ubb.ac.id/machine/issue/view/216
https://journal.ubb.ac.id/machine/issue/view/283
https://journal.ubb.ac.id/machine/issue/view/316
https://journal.ubb.ac.id/machine/issue/view/306
https://drive.google.com/file/d/18U_s0rCOb9wdJ02MSyDt9LwwgWwOxwP5/view?usp=drive_link
https://drive.google.com/file/d/19J5NtXH6tLPgrNke3iiX6jiAjWrJ9Wh-/view?usp=drive_link