Luhmann, Niklas (1982). "The World Society as a Social System". International Journal of General Systems. Informa UK Limited. 8 (3): 131–138. doi:10.1080/03081078208547442. ISSN0308-1079.
Varela, F.G.; Maturana, H.R.; Uribe, R. (1974). "Autopoiesis: The organization of living systems, its characterization and a model". Biosystems. Elsevier BV. 5 (4): 187–196. doi:10.1016/0303-2647(74)90031-8. ISSN0303-2647. PMID4407425.
nih.gov
pubmed.ncbi.nlm.nih.gov
Varela, F.G.; Maturana, H.R.; Uribe, R. (1974). "Autopoiesis: The organization of living systems, its characterization and a model". Biosystems. Elsevier BV. 5 (4): 187–196. doi:10.1016/0303-2647(74)90031-8. ISSN0303-2647. PMID4407425.
Luhmann, Niklas (1982). "The World Society as a Social System". International Journal of General Systems. Informa UK Limited. 8 (3): 131–138. doi:10.1080/03081078208547442. ISSN0308-1079.
Varela, F.G.; Maturana, H.R.; Uribe, R. (1974). "Autopoiesis: The organization of living systems, its characterization and a model". Biosystems. Elsevier BV. 5 (4): 187–196. doi:10.1016/0303-2647(74)90031-8. ISSN0303-2647. PMID4407425.