Algebraic Description of Technical Chemical Systems II. Material Systems And Changes. Hungarian Journal of Industry and Chemistry, [S. l.], v. 1, n. 2, p. 163–184, 1973. DOI: 10.1515/527. Disponível em: https://hjic.mk.uni-pannon.hu/index.php/hjic/article/view/527. Acesso em: 8 apr. 2025.