ÁBEL, István; DOBOS, Imre. Singularity in the Discrete Dynamic Leontief Model. Periodica Polytechnica Social and Management Sciences, [S. l.], v. 25, n. 2, p. 158–164, 2017. 10.3311/PPso.8432. Disponível em: https://pp.bme.hu/so/article/view/8432. Acesso em: 29 mar. 2024.