CarstaC.SimonCarstaC., Why Norwegians Don’t Have Their Pigs in the Forest: Illuminating Nordic ‘Co-Operation’, „Behavior and Social Issues”, 26 (1), 2017, s. 172–186, DOI: 10.5210/bsi.v26i0.7317, ISSN2376-6786 [dostęp 2020-07-17](ang.).
CarstaC.SimonCarstaC., Why Norwegians Don’t Have Their Pigs in the Forest: Illuminating Nordic ‘Co-Operation’, „Behavior and Social Issues”, 26 (1), 2017, s. 172–186, DOI: 10.5210/bsi.v26i0.7317, ISSN2376-6786 [dostęp 2020-07-17](ang.).