1. Act on Groups of Agricultural Producers and Their Associations and on Amendments of Other Acts of 15 September 2000, Official Journal of 2000, No. 88, Pos. 983 with later amendments.
2. Act on Groups of Agricultural Producers and Their Associations of 18 June 2004, Official Journal of 2004, No. 162, Pos. 1694.
3. Act on Groups of Agricultural Producers and Their Associations of 15 December 2006, Official Journal of 2006, No. 251, Pos. 1847.
4. Adamkiewicz-Drwiłło, H. 2002 Uwarunkowania konkurencyjności przedsiębiorstwa [Determinants of competitiveness of the company], Warszawa: PWN.
5. Agriculture Canada, Agri-Food Policy Directorate 1993 Framework for Analyzing the Competitiveness of the Agri-Food Sector, Working Paper 3–93, Agriculture Canada, Ottawa.