Collins, K. 2006. PLC Programming for Industrial Automation. Exposure Publishing, 120 p. ISBN: 978-1-84685-496-5 .
Rohner, P. 1996. Automation with Programmable Logic Controllers. UNSW Press, 226 p. ISBN: 978-0-86840-287-1 .
Simatic STEP 7 Basic V12.0 System Manual [online]. 2019 [cit. 2019-09-03]. Available from: https://cache.automation.siemens.com/dnl/DA/DAxMjk1NwAA_68113678_HB/STEP_7_Basic_V12_enUS_en-US.pdf.
Simatic S7-1500, Getting Started [online]. 2019 [cit. 2019-09-03]. Available from:
https://www.automation.siemens.com/salesmaterial-as/interactive-manuals/getting-started_simatic-s7-1500/documents/EN/software_complete_en.pdf.
Getting started with S7-PLCSIM Advanced and simulation tables [online]. 2019 [cit. 2019-09-02]. Available from: https://cache.industry.siemens.com/dl/files/047/109759047/att_962042/v3/109759047_PLCSIMAdv_SimTable_DOC_V10_en.pdf.