1.
Sakai AF, Rabello Filho R, Campos PPZ do A, Citadin FR, Lucena BMN de, Costa NC da, et al. Empty delta sign. Rev. Fac. Ciênc. Méd. Sorocaba [Internet]. 2015 Sep. 22 [cited 2025 Dec. 5];17(3):167-8. Available from: https://revistas.pucsp.br/index.php/RFCMS/article/view/22014