¹ Morton AR, King K, Papalia S, Goodman C, Turley KR, Wilmore JH. Comparison of maximal oxygen consumption with oral and nasal breathing.
² Fitzpatrick MF, McLean H, Urton AM, Tan A, O'Donnell D, Driver HS. Effect of nasal or oral breathing route on upper airway resistance during sleep.
³ Bachour A, Maasilta P. Mouth breathing compromises adherence to nasal continuous positive airway pressure therapy.