Maciejczak, M. “REAL-TIME DELPHI SURVEY ON COMPETITION AND COMPETITIVENESS OF GEOGRAPHICAL INDICATIONS AS A NEGOTIATIONS" ISSUE OF THE TRANSATLANTIC TRADE AND INVESTMENT PARTNERSHIP”. Acta Scientiarum Polonorum. Oeconomia, vol. 15, no. 1, Mar. 2016, pp. 65-74, https://aspe.sggw.edu.pl/article/view/403.