PERME, Tomaž, 2009, Translation of extended Petri net model into ladder diagram and simulation with PLC. [online]. 2009. Vol. 55, no. 10, p. 609- 622 in si 131. [Accessed 18 April 2025]. Retrieved from: http://www.dlib.si/details/URN:NBN:SI:doc-NHBTN52Z