IDUÑATE, P. G. A. Specifications of a demand system and its application in Mexico. Estudios Económicos de El Colegio de México, [S. l.], v. 1, n. 2, p. 305–335, 1986. DOI: 10.24201/ee.v1i2.40. Disponível em: https://estudioseconomicos.colmex.mx/index.php/economicos/article/view/40. Acesso em: 2 may. 2024.