Bliwise, D. L., & Young, T. B. (2007). The Parable of Parabola: What the U-Shaped Curve Can and Cannot Tell Us about Sleep. Associated Professional Sleep Societies, LLC.

Bliwise, Donald L., و Terry B. Young. The Parable of Parabola: What the U-Shaped Curve Can and Cannot Tell Us About Sleep. Associated Professional Sleep Societies, LLC, 2007.

Bliwise, Donald L., و Terry B. Young. The Parable of Parabola: What the U-Shaped Curve Can and Cannot Tell Us About Sleep. Associated Professional Sleep Societies, LLC, 2007.