Yulianto, Tony. 2015. “PENERPAN PETRI-NET PADA MODEL GERAKAN BERJALAN TROTTING ROBOT BERKAKI EMPAT (QUADRUPED)”. UJMC (Unisda Journal of Mathematics and Computer Science) 1 (01), 85 - 94. https://doi.org/https://doi.org/10.52166/ujmc.v1i01.440.