Chantal M. Wiepjes, Nienke M. Nota, Christel J.M. de Blok, Maartje Klaver, Annelou L.C. de Vries, S. Annelijn Wensing-Kruger, Renate T. de Jongh, Mark-Bram Bouman, Thomas D. Steensma, Peggy Cohen-Kettenis, Louis J.G. Gooren, Baudewijntje P.C. Kreukels, Martin den Heijer; “The Amsterdam Cohort of Gender Dysphoria Study (1972–2015): Trends in Prevalence, Treatment, and Regrets”; The Journal of Sexual Medicine, Volume 15, Issue 4, April 2018, Pages 582–590,https://en.wikiquote.org/wiki/Transgender