Olga E. Titova, Pleunie S. Hogenkamp, Josefin A. Jacobsson, Inna Feldman, Helgi B. Schioth, and Christian Benedict, «Associations of Self-Reported Sleep Disturbance and Duration with Academic Failure in Community-Dwelling Swedish Adolescents: Sleep and Academic Performance at School,» Sleep Medicine 16 (2015): 87–93.