1. Επίσημη ιστοσελίδα Mayo Clinic, https://www.mayoclinic.org/diseases-conditions/obsessive-compulsive-disorder/symptoms-causes/syc-20354432
2. www.nhs.uk/news/mental-health/ocd-brains-are-different/
3. David A. Clark, Cognitive-behavioral Therapy for OCD, The Guilford Press London 2004