Leone Roberti Maggiore U, Bizzarri N, Scala C, Tafi E, Siesto G, Alessandri F, Ferrero S. Symptomatic endometriosis of the posterior cul-de-sac is associated with impaired sleep quality, excessive daytime sleepiness and insomnia: a case-control study. Eur J Obstet Gynecol Reprod Biol 2017;209:39-43. https://www.ejog.org/article/S0301-2115(15)00425-X/fulltext