Department of Normalized Management Systems, Faculty of Commodity Science, Poznań
University of Economics and Business, Poznań, Poland
Submission date: 2016-07-06
Final revision date: 2016-10-02
Acceptance date: 2016-10-03
Online publication date: 2017-03-22
Publication date: 2017-03-22
Pol. J. Environ. Stud. 2017;26(2):809–817