GHOSH, R. A. Cooking pot markets: An economic model for the trade in free goods and services on the Internet. First Monday, [S. l.], v. 3, n. 2, 1998. DOI: 10.5210/fm.v3i2.580. Disponível em: https://journals.uic.edu/ojs/index.php/fm/article/view/580. Acesso em: 9 dec. 2022.