On the semantics of em: polysemy, synonymy and competition in the prepositional system of Brazilian Portuguese. SciELO Preprints, 2025. DOI: 10.1590/SciELOPreprints.13776. Disponível em: https://preprints.scielo.org/index.php/scielo/preprint/view/13776. Acesso em: 14 maio. 2026.