WANG, N. Preferential schemes: a reappraisal. PSL Quarterly Review, [S. l.], v. 20, n. 80, 2014. DOI: 10.13133/2037-3643/11690. Disponível em: https://rosa.uniroma1.it/rosa04/psl_quarterly_review/article/view/11690. Acesso em: 21 may. 2024.