Ertugrul, S., and E. Soylemez. “Investigation of the Relationship Between Posterior Semicircular Canal Benign Paroxysmal Positional Vertigo and Sleep Quality”. Annals of Medical Research, vol. 26, no. 10, May 2021, pp. 2359-63, http://www.annalsmedres.org/index.php/aomr/article/view/1777.