KLEINER, George; RYBACHUK, Maxim. System Structure of the Economy: qualitative time-space analysis. Fronteira: Journal of Social, Technological and Environmental Science, [S. l.], v. 5, n. 2, p. 61–81, 2016. DOI: 10.21664/2238-8869.2016v5i2.p61-81. Disponível em: https://periodicos.unievangelica.edu.br/index.php/fronteiras/article/view/2031. Acesso em: 5 maio. 2024.