“Hotplace Magnetic Stirrer Automatic Heat Control and Water Velocity Based on PID (Proportional Integral Derivative): Hotplace Magnetic Stirrer Pengatur Panas Automatis dan Kecepatan Air Berbasis PID (Proportional Integral Derivative)” (2021) Procedia of Engineering and Life Science, 1(1). doi:10.21070/pels.v1i1.766.