Aribowo, D., R. Wiryadinata, and D. A. Alexander YH. “Care and Maintenance System Generator Transformer 20KV-150KV”. Electrician : Jurnal Rekayasa Dan Teknologi Elektro, Vol. 8, no. 1, Jan. 2014, pp. 20-30, doi:10.23960/elc.v8n1.122.