HOCHSTÄTTLER, W.; KROMBERG, S. Adjoints and Duals of Matroids Linearly Representable over a Skewfield. Mathematica Scandinavica, Berkeley, CA, United States, v. 78, p. 5–12, 1996. DOI: 10.7146/math.scand.a-12569. Disponível em: https://journals.msp.org/mscand/article/view/1063. Acesso em: 24 jul. 2026.