“The effect of two different thickness of custom tray’s spacer in selective pressure technique on maxillary complete denture basses’ retention – in vivo study”, Tuj-hlth, vol. 43, no. 4, Sep. 2021, Accessed: Nov. 02, 2026. Available: https://journal.latakia-univ.edu.sy/index.php/hlthscnc/article/view/10888