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Information Systems and e-Business Management > 2017 > 15 > 4 > 963-988
European Journal of Management Issues > 2015 > 5 > 10-15
European Journal of Management Issues > 2015 > 4 > 85-92
Problemy Eksploatacji > 2015 > no. 4 > 31--42
MSIE 2011 > 411 - 413
MSIE 2011 > 810 - 814