Yusna, P., and Y. Yennimar. “Implementation Of Extreme Learning Machine Method With GVF Snake For Character Recognition: Implementation Of Extreme Learning Machine Method With GVF Snake For Character Recognition”. Jurnal Mantik, vol. 4, no. 1, May 2020, pp. 695-00, https://iocscience.org/ejournal/index.php/mantik/article/view/840.