1. Iber C, Ancoli-Israel S, Chesson A, Quan SF for the American Academy of Sleep Medicine (2007) AASM manual for the scoring of sleep and associated events rules, terminology, and technical specifications. American Academy of Sleep Medicine, Westchester
2. Redline S, Budhiraja R, Kapur V, Marcus CL, Mateika JH, Mehra R, Parthasarthy S, Somers VK, Strohl KP, Sulit LG, Gozal D, Wise MS, Quan SF (2007) The scoring of respiratory events in sleep: reliability and validity. J Clin Sleep Med: JCSM: Off Public Am Acad Sleep Med 3(2):169–200
3. Penzel T, Hirshkowitz M, Harsh J, Chervin RD, Butkov N, Kryger M, Malow B, Vitiello MV, Silber MH, Kushida CA, Chesson AL Jr (2007) Digital analysis and technical specifications. J Clin Sleep Med: JCSM: Off Public Am Acad Sleep Med 3(2):109–120
4. Bland JM, Altman DG (1986) Statistical methods for assessing agreement between two methods of clinical measurement. Lancet 1(8476):307–310
5. Zhou Q, Lau S, Wu D, Shung KK (2011) Piezoelectric films for high frequency ultrasonic transducers in biomedical applications. Prog Mater Sci 56(2):139–174