Maira Mubashar, et al. “EFFECTS OF RAPID MAXILLARY EXPANSION ON FACIAL SOFT TISSUES IN UNILATERAL POSTERIOR CROSSBITE PATIENTS”. Pakistan Oral & Dental Journal, vol. 42, no. 3, Oct. 2022, pp. 121-4, https://www.podj.com.pk/index.php/podj/article/view/696.