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SID Symposium Digest of Technical Papers > 54 > S1 > 615 - 619
WIRTSCHAFTSINFORMATIK > 2014 > 56 > 1 > 49-54
Business & Information Systems Engineering > 2014 > 6 > 1 > 39-43
Gospodarka Surowcami Mineralnymi > 2008 > T. 24, z. 2/1 > 5-26
Journal of Electronics (China) > 2006 > 23 > 3 > 404-409