PENKA, Doris. Uninterpretable negative features on negative indefinites. Proceedings of the Amsterdam Colloquium, Amsterdam, p. 19–22, 2007. DOI: 10.53437/p46wtc10. Disponível em: https://platform.openjournals.nl/PAC/article/view/22752. Acesso em: 27 aug. 2026.