Williams, M. A., Aurora, S. K., Frederick, I. O., Qiu, C., Gelaye, B., & Cripe, S. M. (2010). Sleep duration, vital exhaustion and perceived stress among pregnant migraineurs and non-migraineurs. BioMed Central.

Williams, Michelle A., Sheena K. Aurora, Ihunnaya O. Frederick, Chunfang Qiu, Bizu Gelaye, και Swee May Cripe. Sleep Duration, Vital Exhaustion and Perceived Stress Among Pregnant Migraineurs and Non-migraineurs. BioMed Central, 2010.

Williams, Michelle A., et al. Sleep Duration, Vital Exhaustion and Perceived Stress Among Pregnant Migraineurs and Non-migraineurs. BioMed Central, 2010.