Susilowati, T., Sugiarto, D. and Mardianto, I. (2020) “Validity Test of Self-Organizing Map (SOM) and K-Means Algorithm for Employee Grouping”, Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi), 4(6), pp. 1171 -. doi: 10.29207/resti.v4i6.2492.