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ECONTECHMOD : An International Quarterly Journal on Economics of Technology... > 2017 > Vol. 6, No 1 > 15--22
Management > 2013 > 17 > 1 > 405-419
Management > 2013 > Vol. 17, no. 1 > 406--420
Wieś i Rolnictwo > 2010 > 1 > 21-47
Zagadnienia Ekonomiki Rolnej > 2009 > 4 > 40-52