Sunardi, D., R. Ritzkal, and A. H. Hendrawan. “Application Of Heat Coffee Passing Tools With Web-Based Monitoring System: Application Of Heat Coffee Passing Tools With Web-Based Monitoring System”. Jurnal Mantik, vol. 4, no. 1, May 2020, pp. 134-8, https://www.ejournal.iocscience.org/index.php/mantik/article/view/718.