Espie, C., Barrie, L., & Forgan, G. (2012). Comparative investigation of the psychophysiologic and idiopathic insomnia disorder phenotypes: Psychologic characteristics, patients' perspectives, and implications for clinical management.

Espie, C., L. Barrie, and G. Forgan. Comparative Investigation of the Psychophysiologic and Idiopathic Insomnia Disorder Phenotypes: Psychologic Characteristics, Patients' Perspectives, and Implications for Clinical Management. 2012.

Espie, C., et al. Comparative Investigation of the Psychophysiologic and Idiopathic Insomnia Disorder Phenotypes: Psychologic Characteristics, Patients' Perspectives, and Implications for Clinical Management. 2012.