“Vibration Analysis to Detect Failure Bearing of Centrifugal Pump ‘Black Liquor Pump’ in PT. Riau Andalas Pulp & Paper (RAPP)”, JTM, vol. 11, no. 2, hlm. 146–152, Okt 2021, doi: 10.21063/jtm.2021.v11.i2.146-152.