1.
Orhon E Şahin, Malkoç T. The effects of yawn-sigh, lip trill and tongue relaxation exercises on frequency and amplitude perturbation of voice in vocal training. CJES [Internet]. 2022 Jan. 31 [cited 2024 Nov. 22];17(1):01-17. Available from: https://un-pub.eu/ojs/index.php/cjes/article/view/6649