Initial Centroid Optimization in K-Means Algorithm for Educational Data Mining. - Raga S. H. Istanto; Arinda D. Listikowati; Bekti P. Wibowo; Fitra Abdurrachman Bachtiar (IICST, 2020)

Detection of online review spam: a literature review. - Raga S. H. Istanto; Wayan Firdaus Mahmudy; Fitra Abdurrachman Bachtiar (SIET, 2020)