https://xn--24-glc1cl.xn--p1acf/%d0%bf%d1%80%d0%b0%d0%b2%d0%b8%d0%bb%d0%b0-%d0%be%d1%84%d0%be%d1%80%d0%bc%d0%bb%d0%b5%d0%bd%d0%b8%d1%8f-%d0%bf%d1%81%d0%b4/%d0%b3%d0%be%d1%81%d1%82-21-001-2013/
ГОСТ 21.001-2013 СПДС. Общие положения