Agung Nugroho, M., Mediatrix Sebatubun, M. and ., S. (2018) “Identifying Arabica Raw Coffee Bean Varieties through Feature Extraction GLCM and Circularity”, International Journal of Engineering & Technology, 7(4.36), pp. 1347–1351. doi:10.14419/ijet.v7i4.36.28984.