1. Communications in Computer and Information Science;K Rástočný,2013
2. EN IEC 61508: Functional safety of electrical/electronic/programmable electronic safety-related systems (2010)
3. EN 50 129: Railway applications – communication, signalling and processing systems – safety-related electronic systems for signaling (2003)
4. http://www.wolfram.com/mathematica/?source=nav
. Accessed 12 February 2015
5. http://www.ptc.com/product/windchill
. Accessed 12 February 2015