-          Donovan Maust, Mario Cristancho, Laurie Gray, Susan Rushing, Chris Tjoa, Michael E. Thase, Chapter 13 - Psychiatric rating scales, Editor(s): Michael J. Aminoff, FrançOis Boller, Dick F. Swaab, Handbook of Clinical Neurology, Elsevier, Volume 106, 2012, Pages 227-237, ISSN 0072-9752, ISBN 9780444520029, https://doi.org/10.1016/B978-0-444-52002-9.00013-9.

-          Mark H. Freeston, Robert Ladouceur, 5 - The Cognitive-Behavioral Treatment of Obsessions, Editor(s): V.E. Caballo, International Handbook of Cognitive and Behavioural Treatments for Psychological Disorders, Elsevier Science Ltd, 1998, Pages 129-160, ISBN 9780080434339, https://doi.org/10.1016/B978-008043433-9/50007-9.

-          Bethany M. Wootton, Remote cognitive–behavior therapy for obsessive–compulsive symptoms: A meta-analysis, Clinical Psychology Review, Volume 43, 2016, Pages 103-113, ISSN 0272-7358,  https://doi.org/10.1016/j.cpr.2015.10.001.