KUHN, H. W. A note on "The law of supply and demand". Mathematica Scandinavica, Berkeley, CA, United States, v. 4, p. 143–146, 1956. DOI: 10.7146/math.scand.a-10463. Disponível em: https://journals.msp.org/mscand/article/view/2861. Acesso em: 25 jul. 2026.