Loures, E. R., Santos, E. A., & De Paula, M. A. B. (2010). A control-monitoring-maintenance framework based on Petri net with objects in fl exible manufacturing system. Application to a robot-driven fl exible cell. Brazilian Journal of Operations & Production Management, 4(1), 5–22. Retrieved from https://bjopm.org.br/bjopm/article/view/BJV4N1_2007_P1