Custodio, L., Carlson, C. R., Upton, B., Okeson, J. P., Harrison, A. L., & de Leeuw, R. (1969). The impact of cigarette smoking on sleep quality of patients with masticatory myofascial pain. Journal Of Oral & Facial Pain And Headache, 29(1), 15-23. https://doi.org/10.11607/ofph.1266 (Original work published 1969)