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https://mxsmirnov.com/2012/05/18/%d1%87%d0%b5%d0%bc-%d0%b5%d1%89%d0%b5-%d0%be%d1%82%d0%bb%d0%b8%d1%87%d0%b0%d0%b5%d1%82%d1%81%d1%8f-ecm-%d0%be%d1%82-%d1%81%d1%8d%d0%b4/
Чем еще отличается ECM от СЭД