1. Barber C. Autism and Asperger's conditions: a practical guide for nurses. London, Quay Books. 2011
2. Kubler-Ross E, Kessler D. On grief and grieving: finding the meaning of grief. London; Simon & Schuster. 2014
3. Parkes C, Prigerson H. Bereavement: studies of grief in adult life. 4th edn. London: Penguin; 2010